CN103316816A - Detachable two-piece dispensing needle - Google Patents

Abstract

The invention discloses a detachable split type dispensing needle head, which comprises a hollow bottom and a needle head, wherein the hollow bottom is made of stainless steel materials, the needle head is conical, an internal thread is arranged in a glue outlet end of a base, an external thread matched with the internal thread is arranged on the outer wall of a glue inlet end of the needle head, the base and the needle head are connected through the matched internal thread and external thread, hollow cavities in the base and the needle head are mutually communicated, glue flows in from the glue inlet end of the base and flows out from a glue outlet end, namely a conical tip, of the needle head; the outer wall of the base is also provided with a circle of clamping boss, and the outer side of the clamping boss is cut with at least two first parallel tangent planes which are symmetrically arranged and used for clamping; two symmetrically arranged second parallel tangent planes for clamping are cut in the middle of the needle head. The invention can save the production cost and is convenient to install.

Description

Detachable two-piece dispensing needle

technical field

The invention relates to a detachable split glue dispensing needle, which is mainly used in the glue outlet of a fully automatic glue spraying machine.

Background technique

The glue outlet of the automatic glue spraying machine needs to use a dispensing needle. Considering that the viscosity of the glue used in the glue spraying equipment is different, and the thickness of the glue spraying line is different, the dispensing head used for the glue spraying equipment should be selected in terms of Note: the dispensing head must be easy to disassemble, replace and clean. Only in this way can the normal use of the machine be guaranteed and it will not be easily blocked. However, the existing dispensing head is easy to block because the glue outlet hole is small. After the blockage, the entire glue head needs to be replaced, resulting in waste. Moreover, due to production needs, the position of dispensing glue often needs to be replaced. At this time, the length of the needle needs to be changed. At present, it can only be changed by changing the glue head. Wasted.

Contents of the invention

In order to overcome the above disadvantages, the present invention provides a detachable split glue dispensing needle.

Technical scheme of the present invention is as follows:

A detachable split-type dispensing needle, including a hollow bottom and a needle made of stainless steel, the needle is conical, the glue outlet end of the base is provided with internal threads, and the outer wall of the glue inlet end of the needle is provided with There is an external thread that matches the internal thread, and the base and the needle are connected through the matching internal thread and external thread, so that the hollow cavity in the base and the needle communicates with each other. The glue flows in from the glue inlet end of the base, and from the glue outlet end of the needle. That is, the tip of the cone flows out; the outer wall of the base is also provided with a ring of clamping bosses, and the outer side of the clamping bosses is cut with at least two symmetrically arranged first parallel sections for clamping; the The middle part of the needle is cut with two symmetrically arranged second parallel sections for clamping. Since the needle is conical and has a small surface area, if too many second parallel sections are set, each second parallel section will be distorted. The clamping area is too small, making it difficult to be clamped during installation.

The length of the external thread on the outer wall of the glue inlet of the needle is less than the depth of the internal thread in the glue outlet of the base.

The outer side of the clamping boss is cut with four first parallel sections for clamping, which are symmetrical in pairs.

The axes of the first parallel section and the second parallel section are in the same direction as the axes of the base and the needle.

The outer wall of the needle is also provided with a circle of limiting boss, the second parallel section is located on one side of the limiting boss, the external thread is located on the other side of the limiting boss, the diameter of the limiting boss greater than the outer diameter of the external thread, and the external thread does not contact the limiting boss.

The beneficial effects of the present invention are:

1. Through the threaded connection, the needle can be disassembled on the base, and during the installation process of the base and the needle, due to the design of the parallel section, it can be clamped more firmly;

2. Because the hole diameter of the glue outflow end of the base is large, it is not easy to be blocked, and the hole diameter of the glue outlet end of the needle tip is small, which is easy to block. Therefore, when the dispensing head needs to be replaced, only the needle part needs to be replaced, which greatly reduces the stainless steel material. cost savings;

3. According to the different products processed by the glue spraying equipment, the position of the required glue dispensing may be easy or difficult. At this time, the length of the needle needs to be changed to complete the glue dispensing. Therefore, when the glue dispensing head needs to be replaced, only the needle part needs to be replaced. , reduce materials and save costs.

Description of drawings

The invention will be illustrated by way of example with reference to the accompanying drawings, in which:

Fig. 1 is a schematic perspective view of the present invention;

Fig. 2 is a sectional view of the present invention;

Fig. 3 is a schematic perspective view of a needle.

Detailed ways

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

The detachable split-type dispensing needle shown in Figure 1 and Figure 2 includes a hollow base 1 and a needle 2 made of stainless steel, the needle 2 is conical, and the glue outlet end of the base 1 is provided with a There is an internal thread 11, and the outer wall of the glue inlet end of the needle 2 is provided with an external thread 21 that cooperates with the internal thread 11. The base 1 and the needle 2 are connected through the matched internal thread 11 and the external thread 21, so that the base 1 and the needle 2 are hollow. The cavities communicate with each other, the glue flows in from the glue inlet port 12 of the base 1, and flows out from the glue outlet port 22 of the needle 2, that is, the tip of the cone. Wherein, the length of the external thread 21 on the outer wall of the glue inlet end of the needle 2 is smaller than the depth of the internal thread 11 in the glue outlet end of the base 1 . The base is easier to disassemble and assemble on the glue spraying equipment, and through the threaded connection, the needle is also easier to disassemble and assemble on the base, and at the same time, it can effectively prevent glue leakage.

Since the glue outlet end of the base has a large aperture, it is not easy to block, while the glue outlet end of the needle tip has a small aperture and is easy to block. Therefore, when the dispensing head needs to be replaced, only the needle part needs to be replaced, which greatly reduces the stainless steel material and saves costs. According to the different products processed by the glue spraying equipment, the position where the glue needs to be dispensed is easy or difficult. At this time, it is necessary to change the length of the needle to complete the glue dispensing. Therefore, when the glue dispensing head needs to be replaced, only the needle part needs to be replaced, reducing materials, saving costs.

The outer wall of the base 2 is also provided with a circle of clamping bosses 3, and the outside of the clamping bosses 3 is cut with at least two symmetrically arranged first parallel sections 31 for clamping. Preferably, the The outer side of the clamping boss 3 is cut with four first parallel cut surfaces 31 for clamping, which are symmetrical in pairs; the middle part of the needle head 2 is cut with two symmetrically arranged second parallel cut surfaces 23 for clamping , because the needle is conical and has a small surface area, if too many second parallel sections are provided, the clamping area of each second parallel section will be too small, making it difficult to be clamped during installation. The design of the first parallel section 31 and the second parallel section 23 makes it easier to be clamped during installation. The axes of the first parallel section 31 and the second parallel section 23 are in the same direction as the axes of the base 1 and the needle 2 .

As shown in Fig. 3 , the outer wall of the needle 2 is also provided with a circle of limiting boss 4, the second parallel section 23 is located on one side of the limiting boss 4, and the external thread 21 is located on the limiting boss 4. 4, the diameter of the limiting boss 4 is larger than the outer diameter of the external thread 21, and the outer thread 21 does not contact the limiting boss 4.

The above is based on the inspiration of the present invention. Through the above description, relevant workers can make various changes and modifications within the scope of not deviating from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (5)

1. detachable split type dispensing needle head, it is characterized in that: the base (1) and the syringe needle (2) that comprise the hollow of being made by stainless steel material, be provided with internal thread (11) in the glue port of export of described base (1), the outer wall of the glue arrival end of syringe needle (2) is provided with the external screw thread (21) that cooperates with internal thread (11), base (1) is connected 2 with syringe needle) be connected 21 by the internal thread (11) that cooperates with external screw thread) connect, the cavity of base (1) and the interior hollow of syringe needle (2) is interconnected, glue flows into from the glue arrival end (12) of base (1), from the glue port of export (22) outflow of syringe needle (2); Also be provided with a circle clamping boss (3) on the outer wall of described base (2), at least two symmetrically arranged the first parallel cut surfaces (31) for clamping are cut in the outside of described clamping boss (3); Two symmetrically arranged the second parallel cut surfaces (23) for clamping are cut at the middle part of described syringe needle (2).

2. detachable split type dispensing needle head according to claim 1 is characterized in that: the length of the external screw thread (21) of described syringe needle (2) glue arrival end outer wall is less than the degree of depth of the internal thread (11) in base (1) the glue port of export.

3. detachable split type dispensing needle head according to claim 1 is characterized in that: four the first parallel cut surfaces (31) that are used for clamping are cut in the outside of described clamping boss (3), and symmetrical in twos.

4. detachable split type dispensing needle head according to claim 1, it is characterized in that: the axis of the axis of described the first parallel cut surface (31), the second parallel cut surface (23) all axis direction with base (1) and syringe needle (2) is identical.

5. the described detachable split type dispensing needle head of each claim in 4 according to claim 1, it is characterized in that: also be provided with a circle positive stop lug boss (4) on the outer wall of described syringe needle (2), described the second parallel cut surface (23) is positioned at a side of positive stop lug boss (4), external screw thread (21) is positioned at the opposite side of positive stop lug boss (4), the diameter of described positive stop lug boss (4) is greater than the external diameter of external screw thread (21), and external screw thread (21) does not contact with positive stop lug boss (4).

Images