TW201735280A - Hot melt adhesive packaging machine to push hot melt adhesive at low pressure massively and precisely for preventing the overflow by the linking-up motion of a pushing-pressing mechanism - Google Patents

Abstract

A hot melt adhesive packaging machine is disclosed, which comprises: a feeding tube, one end of the feeding tube having a discharging outlet, the discharging outlet being connected to the axial space of the feeding tube; a feeding cylinder with a guide tube on its bottom, the bottom end of guide tube being connected to the space of the feeding tube in order for the liquid hot melt adhesive to be inputted; a plunger penetrating the space of the feeding tube in a manner of linearly reciprocating motion. By the linking-up motion of a pushing-pressing mechanism, the plunger pushes the hot melt adhesive, so that the hot melt adhesive is outputted from the discharging outlet of feeding tube at a pressure less than 100kgf/cm2, and enters the mold from the feeding inlet of mold. As a result, the hot melt adhesive can be pushed at low pressure massively and precisely, so as to package a chip safely and prevent the outward overflow of the hot melt adhesive.

Description

Hot melt adhesive packaging machine

The invention relates to a hot melt adhesive packaging machine, in particular to a person who not only can be packaged in a large amount and accurately, but also can effectively save materials and is convenient to use to save manpower.

For industries such as electronics or automobiles, their component or structure control wafers have been used in large numbers and are gradually increasing. Based on the fragility of the wafer and the non-Newtonian fluid properties of the hot melt adhesive, such products cannot be precisely metered by an injection molding machine at a high temperature melting temperature and an injection pressure of about 2,500 kgf/cm ² . Therefore, various control wafers are mostly packaged by low-pressure injection molding of hot melt adhesive to ensure that the wafer is not affected by the environment, enabling long-term and efficient operation.

At present, the hot melt adhesive package is commonly used, mainly after melting the hot melt adhesive, manually or mechanically, using gravity to cover the hot melt adhesive on the wafer, and then cooling for about one hour to achieve the effect of the wafer package. In order to reduce the production cost in large quantities and quickly, another mechanical hot melt adhesive package is used to push the hot melt adhesive with a gear pump. The main purpose is to continuously stir the gear in the gear pump, so that the hot melt glue is continuously introduced from the feed hole, and then continuously extruded from the discharge hole; and connected to the discharge hole by a needle valve to achieve the measurement The effect. However, the above method is prone to the problem of overflowing due to the idle speed before the rotation of the gear is stopped, and it is not convenient to disassemble and replace.

In view of the above, in order to provide a structure different from the conventional technology and to improve the above disadvantages, the inventors have accumulated many years of experience and continuous development and improvement, and the present invention has been produced.

An object of the present invention is to provide a hot melt adhesive packaging machine that accurately interlocks a plunger with a pushing mechanism to push the plunger to push the hot melt adhesive and let the hot melt adhesive enter the mold to package the wafer. The gear is used to stir the problem of the glue generated by the hot melt adhesive, which can effectively save materials and keep the implement clean to reduce the labor waste caused by the cleaning.

An object of the present invention is to provide a hot melt adhesive packaging machine in which a front material tube and a rear material tube are coaxially formed into a material tube, and the base and the feeding tube are respectively connected to the front material tube, which can solve the problem that the conventional gear pump is difficult to be used. Disassembly, replacement and cleaning problems, and easy to use.

For the above purposes, the hot melt adhesive packaging machine of the present invention comprises a material tube, a plunger, a feeding cylinder and a pushing mechanism. Wherein, the material tube has an axial space, one end of the material tube has a discharge port, the discharge port communicates with the space, and the discharge port is for pressing against the feed inlet of a mold; the plunger is in a straight line The reciprocating motion is disposed in the space of the material pipe; the feeding cylinder is for holding the hot melt adhesive, and the bottom of the feeding cylinder has a conduit, and the bottom end of the conduit is connected with the space of the material pipe for the hot melt of the input liquid The pressing mechanism is connected to one end of the plunger for interlocking the plunger to push the hot melt adhesive, and the hot melt adhesive is introduced into the mold from the feed inlet of the mold at a pressure of less than 100 kgf/cm ² .

In practice, the invention further includes a heating coil for heating the hot melt within the feed barrel.

When implemented, the present invention further includes a base that is horizontally reciprocable, and the top end of the base is connected to the material tube. The tube comprises a coaxial and releasable one of the front tube and a rear tube, the top end of the base is connected upward to the bottom end of the front tube, and the tube at the bottom of the feeding tube is connected downward to the top end of the front tube.

In implementation, the pressing mechanism comprises a low-speed driving structure, a screw having a first spiral and a second spiral at one end of the plunger, and the low-speed driving structure is connected to one end of the screw for driving the screw to rotate, the first of the screw The second screw is screwed to drive the plunger to reciprocate linearly with respect to the screw.

In implementation, the pressing mechanism may further comprise a low-speed driving structure, a nut and a screw located at one end of the plunger, and a low-speed driving structure connecting nut for driving the nut to rotate, and the nut is screwed to the plunger end The outer spiral is for driving the plunger to reciprocate linearly with respect to the nut.

In implementation, the low-speed driving structure includes sequentially connecting one of a servo motor, a speed reducer and a belt, and the servo motor is electrically connected to a control box for controlling the operation of the servo motor.

In order to further understand the present invention, the specific embodiments of the present invention and the effects achieved thereby are described in detail below with reference to the drawings and drawings.

1‧‧‧Hot melt adhesive packaging machine

2‧‧‧ material tube

21‧‧‧Front tube

211‧‧‧Outlet

22‧‧‧After tube

23‧‧‧ Space

3,8‧‧‧Plunger

31‧‧‧ end face

4‧‧‧Base

5‧‧‧ Feeding cylinder

51‧‧‧heating coil

52‧‧‧ catheter

6‧‧‧Pushing mechanism

61‧‧‧second spiral

62‧‧‧ screw

621‧‧‧first spiral

63‧‧‧Drive structure

64‧‧‧Servo motor

65‧‧‧Reducer

66‧‧‧Belt

67‧‧‧ Nuts

68‧‧‧External spiral

7‧‧‧Mold

71‧‧‧ Feed inlet

9‧‧‧Control box

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic cross-sectional view of a preferred embodiment of the present invention.

2 and 3 are diagrams showing the state of use of the preferred embodiment of the present invention.

Figure 4 is a schematic cross-sectional view showing another embodiment of the pressing mechanism of the preferred embodiment of the present invention.

Referring to FIG. 1 , a preferred embodiment of the present hot melt adhesive packaging machine 1 includes a material tube 2 , a plunger 3 , a base 4 , a feed barrel 5 , and a pushing mechanism. 6.

The material tube 2 is substantially cylindrical, and includes a coaxial front material tube 21 and a rear material tube 22. The front material tube 21 and the rear material tube 22 respectively have a front end and a rear end opposite to the front end, and the front material tube 21 After the end locks the front end of the material tube 22, the front material tube 21 and the rear material tube 22 can separate the front material tube 21 and the rear material tube 22 after the lock release. In addition, the tube 2 has a cylindrical space 23 concentric with the tube 2, and the front end of the front tube 21 has a discharge port 211, and the discharge port 211 communicates with the space 23. The plunger 3 has a long rod shape and is coaxially bored in the space 23 of the material tube 2 in a linear reciprocating manner.

The top end of the base 4 is connected upwardly to the bottom end of the front material tube 21, and the connection portion is located at the center of gravity of the entire group of mechanisms, so that when the base 4 is horizontally reciprocated on a track, the material tube 2 is advanced, and the front tube is advanced. The discharge port 211 of 21 is pressed against the feed inlet 71 of a mold 7; or the feed pipe 2 is retracted, so that the discharge port 211 of the front feed pipe 21 is separated from the feed inlet 71 of the mold 7.

The feeding cylinder 5 is for holding hot melt glue, and the heating coil 51 is wound around the outer side of the feeding cylinder 5 to heat the hot melt glue in the feeding cylinder 5 to a low temperature of about 200 ° C or lower to make the solid hot melt adhesive. Melting is liquid. The bottom of the feed cylinder 5 has a conduit 52. The bottom end of the conduit 51 is connected downwardly to the top end of the front feed pipe 21. The bottom end of the conduit 51 communicates with the space 23 in the front feed pipe 21 for inputting liquid hot melt adhesive. .

The pressing mechanism 6 includes an inner spiral, a screw 62 and a low-speed driving structure 63, wherein the inner spiral is located in one end of the plunger 3 and is concentric with the plunger 3, and the inner spiral is used as the second a spiral 61; the outer circumference of the screw 62 has a spiral that can be screwed with the inner spiral, and the outer spiral is used as the first spiral 621; in practice, the first spiral 621 can also be an inner spiral, and the second spiral 61 For the outer spiral. The low-speed driving structure 63 includes a servo motor 64, a speed reducer 65 and a belt 66. The servo motor 64 is electrically connected to a control box 9 for controlling the operation of the servo motor 64, and the belt 66 is connected to the screw 62. At one end, when the servo motor 64 drives the screw 62 to rotate, the plunger 3 linearly reciprocates relative to the screw 62 via the relative movement of the first spiral 621 and the second spiral 61.

Thereby, as shown in Fig. 2, when the plunger 3 is retracted, one end face 31 of the plunger 3 is located on the side of the conduit 52 at the bottom of the feed cylinder 5, and the hot melt adhesive in the feed cylinder 5 flows downward into the feed pipe. 2 space 23, and fill the space 23. As shown in FIG. 3, based on the electromechanical integration of the control box 9, the servo motor 64 can be controlled to generate a precise running speed to interlock the plunger 3, and the end face 31 of the plunger 3 pushes the liquid hot melt adhesive and enables the hot melt adhesive. At a pressure of less than 100 kgf/cm ² , the discharge port 211 of the front feed pipe 21 passes through the feed inlet 71 of the die 7 into the mold 7 to encapsulate the wafer.

Please refer to FIG. 4 , which is another embodiment of the pressing mechanism 6 , which is different from the embodiment of the pressing mechanism 6 in that the pressing mechanism 6 includes a low-speed driving structure 63 and a screw. Cap 67 and an outer spiral 68. The low-speed driving structure 63 is connected to the nut 67, and the outer spiral 68 is formed on the outer periphery of one end of the plunger 8, and is screwed with the nut 67. Thereby, when the low-speed driving structure 63 drives the nut 67 to rotate, the plunger 8 can be linearly reciprocated relative to the nut 67 to push the liquid hot-melt adhesive.

Therefore, the present invention has the following advantages:

1. The invention is based on the electromechanical integrated control of the control box, so that the servo motor produces an accurate running speed, so that the plunger can directly and accurately push the hot melt adhesive, and the low temperature hot melt adhesive is pushed out at low pressure to package the wafer. Therefore, not only the waste of materials can be avoided, but also the integrity of the wafer can be ensured to effectively achieve the effect of the package.

2. The invention combines the front material tube and the rear material tube into a material tube, and connects the base and the feeding tube to the front material tube respectively, and connects the pressing mechanism to the rear material tube, so that the whole mechanism can be driven not only through the base Move back and forth, and it is convenient for the operator to directly remove the rear material tube and the pushing mechanism to clean and replace the machine tool to save manpower.

3. The present invention drives the plunger to reciprocate linearly through the relative movement of different spirals. Therefore, the length of the material tube can be effectively shortened to save space occupied by the entire mechanism.

In summary, according to the above disclosure, the present invention can achieve the intended purpose, providing a not only avoiding waste of materials, but also ensuring the integrity of the wafer to effectively achieve the package. The effect is that the hot melt adhesive packaging machine which can conveniently clean and replace the machine tool to save manpower and reduce the space occupied by the whole mechanism has great value in industrial use, and the invention patent application is filed according to law.

1‧‧‧Hot melt adhesive packaging machine

2‧‧‧ material tube

21‧‧‧Front tube

211‧‧‧Outlet

22‧‧‧After tube

23‧‧‧ Space

3‧‧‧Plunger

4‧‧‧Base

5‧‧‧ Feeding cylinder

51‧‧‧heating coil

52‧‧‧ catheter

6‧‧‧Pushing mechanism

61‧‧‧second spiral

62‧‧‧ screw

621‧‧‧first spiral

63‧‧‧Drive structure

64‧‧‧Servo motor

65‧‧‧Reducer

66‧‧‧Belt

7‧‧‧Mold

71‧‧‧ Feed inlet

9‧‧‧Control box

Claims (7)

A hot melt adhesive packaging machine includes: a material tube having an axial space, one end of the material tube has a discharge port, the discharge port communicates with the space, and the discharge port is configured to be pressed against a feeding inlet of a mold; a plunger is disposed in a space of a linear reciprocating motion in the space of the material tube; a feeding cylinder is provided for holding a hot melt adhesive, and a conduit has a conduit at the bottom of the feeding cylinder The bottom end of the conduit is in communication with the space of the material tube for inputting liquid hot melt adhesive; and a pressing mechanism is connected to one end of the plunger for interlocking the plunger to push the hot melt adhesive and heat The melt enters the mold from the feed inlet of the mold at a pressure of less than 100 kgf/cm ² . The hot melt adhesive packaging machine of claim 1, further comprising a heating coil for heating the hot melt adhesive in the feed cylinder. The hot melt adhesive packaging machine of claim 1, further comprising a horizontally reciprocable base, the top end of the base being connected to the material tube. The hot melt adhesive packaging machine of claim 3, wherein the material tube comprises a coaxial and releasable one of the front material tube and a rear material tube, the top end of the base being upwardly connected to the front material tube At the bottom end, the conduit at the bottom of the feed barrel is connected downwardly to the top end of the front tube. The hot melt adhesive packaging machine of claim 1, wherein the pressing mechanism comprises a low-speed driving structure, a screw having a first spiral, and a second spiral at one end of the plunger, the low The rotational speed driving structure is connected to one end of the screw for driving the screw to rotate. The first screw of the screw is screwed to the second spiral for driving the plunger to reciprocate linearly with respect to the screw. The hot melt adhesive packaging machine of claim 1, wherein the pressing mechanism comprises a low-speed driving structure, a nut and a screw located at one end of the plunger, the low-speed driving The nut is coupled to the nut for driving the nut to rotate, and the nut is screwed to the outer end of the plunger to drive the plunger to linearly reciprocate relative to the nut. The hot melt adhesive packaging machine of claim 5, wherein the low speed driving structure comprises a servo motor, a speed reducer and a belt connected in sequence, and the servo motor is electrically connected to a control box. For controlling the operation of the servo motor.