CN111672667A

CN111672667A - Negative pressure spraying fixture

Info

Publication number: CN111672667A
Application number: CN202010550155.8A
Authority: CN
Inventors: 濮建强; 张自强; 翁文武; 胡杨海; 夏海威
Original assignee: Zhejiang Haers Vacuum Containers Co Ltd
Current assignee: Zhejiang Haers Vacuum Containers Co Ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2020-09-18

Abstract

The invention discloses a negative pressure spraying clamp which comprises a fixed shaft, wherein a positioning seat and a silica gel pad are sleeved on a stud pin at the upper end of the fixed shaft, a blind hole with an upward opening is arranged in the center of the fixed shaft, and a hole cavity of the blind hole is connected with a negative pressure air source through an air exhaust one-way valve and is connected with a positive pressure air source through an air charging one-way valve; when the positive pressure air source is closed and the negative pressure air source is opened, the mouth part of the cup or the kettle to be sprayed, which is placed on the silica gel pad, is tightly sucked on the silica gel pad, and the top part of the surrounding edge of the positioning seat is propped against the shoulder part of the cup or the kettle to be sprayed. The negative pressure spraying clamp is time-saving, labor-saving and efficient when the upper wire and the lower wire of the cup or kettle to be sprayed are inserted, the mouth part of the cup or kettle is not damaged, and the wire can be changed quickly and conveniently; the paint can be ensured not to be sprayed into the vacuum cup during spraying, and the paint flying at the mouth part can not occur; low cost, good stability and durability.

Description

Negative pressure spraying fixture

Technical Field

The invention relates to a device for spraying the outer surface of cup and pot products, in particular to a negative pressure spraying clamp.

Background

After the cup and the pot are processed, paint is needed to be sprayed on the outer surfaces of the cup and the pot. The existing cup and kettle spraying is basically performed by adopting an assembly line automatic spraying method, for example, the invention with the application number of 201911090214.1 applies to 'spraying equipment for the outer surface of a stainless steel vacuum cup', the vacuum cup is reversely buckled on a fixed connecting block 55, and then the vacuum cup is clamped and supported by a supporting block 53, and the spraying equipment has the defects that: paint is easy to fly into the vacuum cup in the spraying process, so that poor spraying is caused.

In order to overcome the defects, a stainless steel clamp with a double-end thread structure is adopted by people, one end of the thread is fixed with the production line, the other end of the thread is matched and customized according to the thread at the mouth of the cup kettle, and the cup kettle is fixedly connected through the thread to spray the outer surface. The structure avoids paint from flying into the vacuum cup to a great extent, but the following defects still exist in use: the clamp with the thread structure needs to be screwed whether the clamp is replaced or a product is put on line, and in addition, a sealing ring made of a tendon material needs to be placed between the product and the clamp, so that the time and labor are consumed, and the efficiency is lower; the clamp with the thread structure is thin-walled stainless steel, deformation is easy to occur, and the phenomena of no screwing in and no screwing tightly often occur, so that paint (flying paint for short) is easily adhered to the mouth of a product in the spraying process, and poor spraying is caused; in addition, the clamp with the thread structure is easy to cause scratches at the mouth of the cup kettle product in the screwing process; moreover, the stainless steel fixture has long processing period and high cost.

Disclosure of Invention

The invention aims to provide a negative pressure spraying clamp, which is time-saving, labor-saving and efficient when a cup or a kettle to be sprayed is subjected to wire loading and unloading, the mouth part cannot be damaged, and the wire can be changed quickly and conveniently; the paint can be ensured not to be sprayed into the vacuum cup during spraying, and the paint flying at the mouth part can not occur; low cost, good stability and durability.

In order to achieve the purpose, the invention adopts the following technical scheme:

a negative pressure spraying clamp comprises a fixed shaft, wherein the lower end of the fixed shaft is fixed on spraying equipment, a positioning seat for positioning a cup or a kettle to be sprayed and a silica gel pad for sealing the mouth of the cup or the kettle to be sprayed are sequentially sleeved on a stud pin at the upper end of the fixed shaft from bottom to top, a blind hole with an upward opening is formed in the center of the fixed shaft, and the hole cavity of the blind hole is connected with a negative pressure air source through an air exhaust one-way valve and is connected with a positive pressure air source through an air; when the positive pressure air source is closed and the negative pressure air source is opened, the mouth part of the cup or the kettle to be sprayed, which is placed on the silica gel pad, is tightly sucked on the silica gel pad, and the top part of the surrounding edge of the positioning seat is propped against the shoulder part of the cup or the kettle to be sprayed.

And the top of the surrounding edge is provided with a chamfer.

The positioning seat is made of glass fiber reinforced PP materials.

The hardness of the silica gel pad is 30-40 HR.

The air exhaust check valve comprises a sleeve, an ejector rod, a spring tightness regulator, a compression spring and a sealing ring, wherein a conical ejector rod head is arranged at one end of the ejector rod, the spring tightness regulator is sleeved on the ejector rod and is in threaded connection with the internal thread at one end of the sleeve, the sealing ring is sleeved in a groove of the conical ejector rod head, the compression spring is arranged on the ejector rod between the conical ejector rod head and the spring tightness regulator, and the conical ejector rod head is abutted against the inner end of an air vent of the sleeve under the action of the compression spring.

The central hole of the silica gel pad is in interference fit with the pin, and the single-side interference magnitude is 0.2 mm; the bottom center hole of the positioning seat is in clearance fit with the pin, and the single-side clearance is 0.2 mm.

The silica gel pad is arranged at the bottom of the positioning seat.

Compared with the prior art, the invention has the beneficial effects that: by adopting the technical scheme, the pin at the upper end of the fixed shaft is sequentially sleeved with the positioning seat for positioning the cup or kettle to be sprayed and the silica gel pad for sealing the mouth part of the cup or kettle to be sprayed from bottom to top, the center of the fixed shaft is provided with the blind hole with the upward opening, the hole cavity of the blind hole is connected with the negative pressure air source through the air exhaust check valve and is connected with the positive pressure air source through the air inflation check valve, when the positive pressure air source is closed and the negative pressure air source is opened, the mouth part of the cup or kettle to be sprayed, which is placed on the silica gel pad, is sucked on the silica gel pad, the upper line of the cup or kettle to be sprayed is not required to be screwed, the cup or kettle is directly sucked on the silica gel pad, the efficiency is high, when the cup or kettle to be sprayed is taken off, the positive pressure air source is opened and the negative pressure air source; the wire replacement only needs to replace the positioning seat, the positioning seat is in plug-in connection with the fixed shaft, the taking is convenient, and the rapid wire replacement can be realized; the top of the surrounding edge of the positioning seat is pressed against the shoulder of the cup or the kettle to be sprayed, so that paint can not be sprayed into the vacuum cup during spraying, and the flying paint at the opening can not occur.

The further beneficial effects are that: enclose and set up the chamfer along children top, firstly make it more sharp-pointed, can prevent that contact surface paint from flying into, secondly can prevent that contact surface paint from piling up. The positioning seat is made of glass fiber reinforced PP materials, direct injection molding can be achieved, production speed is high, cost is low, and the glass fiber reinforced PP cannot deform under the conditions of high temperature, long time and low load, so that the positioning seat has good dimensional stability.

The central hole of the silica gel pad is in interference fit with the pin, and the single-side interference magnitude is 0.2 mm; the bottom center hole of the positioning seat is in clearance fit with the pin, and the single-side clearance is 0.2 mm. The matching structure can ensure the rapid insertion and the removal of the positioning seat and can also ensure the air sealing between the pin and the positioning seat.

The hardness value of the silica gel pad is 30-40 HR, so that a cup or a kettle to be sprayed can be well fixed, and the best sealing effect can be generated between the mouth of the cup or the kettle to be sprayed and the silica gel pad under the action of negative pressure.

Drawings

FIG. 1 is a schematic structural view of the present invention;

figure 2 is a schematic view of the suction check valve of figure 1.

Detailed Description

In order to make the technical solution of the present invention clearer, the present invention is described in detail below with reference to fig. 1 and 2. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

The invention relates to a negative pressure spraying fixture, which comprises a fixed shaft 1, wherein the lower end of the fixed shaft is fixed on spraying equipment, a positioning seat 2 for positioning a cup or a kettle 6 to be sprayed and a silica gel pad 3 for sealing the opening part of the cup or the kettle 6 to be sprayed are sequentially sleeved on a pin 1-1 at the upper end of the fixed shaft 1 from bottom to top, a blind hole 1-2 with an upward opening is formed in the center of the fixed shaft 1, and the hole cavity of the blind hole 1-2 is connected with a negative pressure air source through an air exhaust one-way valve 4 and is connected with a positive pressure air source; when the positive pressure air source is closed and the negative pressure air source is opened, the mouth part of the cup or the kettle 6 to be sprayed, which is placed on the silica gel pad 3, is tightly sucked on the silica gel pad 3, and the top part of the surrounding edge 2-1 of the positioning seat 2 is propped against the shoulder part 6-1 of the cup or the kettle 6 to be sprayed.

Preferably, the top of the surrounding edge 2-1 is provided with a chamfer 2-2, so that the contact surface paint can be prevented from flying in and being accumulated. The positioning seat 2 is made of a glass fiber reinforced PP material, the positioning seat is made of the glass fiber reinforced PP material, direct injection molding can be achieved, the production speed is high, the cost is low, and the glass fiber reinforced PP cannot deform under the conditions of high temperature and long-time low load, so that the positioning seat has good dimensional stability. The hardness of the silica gel pad 3 is preferably 30-40 HR and is arranged at the bottom of the positioning seat 2. The air exhaust one-way valve 4 comprises a sleeve 4-1, a push rod 4-2, a spring tightness regulator 4-4, a compression spring 4-5 and a sealing ring 4-6, wherein one end of the push rod 4-2 is provided with a conical push rod head 4-3, the spring tightness regulator 4-4 is sleeved on the push rod 4-2 and is in threaded connection with an internal thread at one end of the sleeve 4-1, the sealing ring 4-6 is sleeved in a groove of the conical push rod head 4-3, the compression spring 4-5 is arranged on the push rod 4-2 between the conical push rod head 4-3 and the spring tightness regulator 4-4, and under the action of the compression spring 4-5, the conical push rod head 4-3 is abutted against the inner end of an air vent 4-7 of the sleeve 4-1. The sealing rings 4-6 are preferably of a fluororubber material.

The structure of the inflation check valve 5 is the same as that of the air suction check valve 4, and the description is omitted.

As further optimization, the central hole of the silica gel pad 3 is in interference fit with the pin 1-1, and the unilateral interference magnitude is 0.2 mm; the bottom center hole of the positioning seat 2 is in clearance fit with the pin 1-1, and the single-side clearance is 0.2 mm.

Claims

1. The utility model provides a negative pressure spraying anchor clamps, includes that the lower extreme is fixed in fixed axle (1) on the spraying equipment, its characterized in that: a positioning seat (2) for positioning a cup or a kettle (6) to be sprayed and a silica gel pad (3) for sealing the opening of the cup or the kettle (6) to be sprayed are sequentially sleeved on a pin (1-1) at the upper end of a fixed shaft (1) from bottom to top, a blind hole (1-2) with an upward opening is formed in the center of the fixed shaft (1), and the hole cavity of the blind hole (1-2) is connected with a negative pressure air source through an air suction one-way valve (4) and is connected with a positive pressure air source through an air inflation one-way valve (5); when the positive pressure air source is closed and the negative pressure air source is opened, the mouth part of the cup or the kettle (6) to be sprayed, which is placed on the silica gel pad (3), is tightly sucked on the silica gel pad (3), and the top of the surrounding edge (2-1) of the positioning seat (2) is propped against the shoulder part (6-1) of the cup or the kettle (6) to be sprayed.

2. The negative pressure spray jig of claim 1, wherein: the top of the surrounding edge (2-1) is provided with a chamfer (2-2).

3. The negative pressure spray jig of claim 2, wherein: the positioning seat (2) is made of glass fiber reinforced PP materials.

4. The negative-pressure spraying jig according to any one of claims 1 to 3, characterized in that: the hardness of the silica gel pad (3) is 30-40 HR.

5. The negative-pressure spraying jig according to any one of claims 1 to 3, characterized in that: the air exhaust one-way valve (4) comprises a sleeve (4-1), an ejector rod (4-2), a spring tightness regulator (4-4), a compression spring (4-5) and a sealing ring (4-6), wherein one end of the ejector rod (4-2) is provided with a conical ejector rod head (4-3), the spring tightness regulator (4-4) is sleeved on the ejector rod (4-2) and is in threaded connection with an internal thread at one end of the sleeve (4-1), the sealing ring (4-6) is sleeved in a groove of the conical ejector rod head (4-3), the compression spring (4-5) is arranged on the ejector rod (4-2) between the conical ejector rod head (4-3) and the spring tightness regulator (4-4), under the action of the compression spring (4-5), the conical ejector rod head (4-3) is abutted against the inner end of the vent hole (4-7) of the sleeve (4-1).

6. The negative-pressure spraying jig according to any one of claims 1 to 3, characterized in that: the center hole of the silica gel pad (3) is in interference fit with the pin (1-1), and the unilateral interference magnitude is 0.2 mm; the bottom center hole of the positioning seat (2) is in clearance fit with the pin (1-1), and the single-side clearance is 0.2 mm.

7. The negative-pressure spraying fixture of claim 6, wherein: the silica gel pad (3) is arranged at the bottom of the positioning seat (2).