TWM511379U - Precise screw dispensing valve - Google Patents

Description

Precision screw dispensing valve

This creation is a precision screw dispensing valve, especially a precision screw dispensing valve that provides precision dispensing.

In the manufacturing process of electronic products, most of them use glue dispensing equipment for gluing. With the advancement of science and technology, the products of electronic products are getting smaller and smaller. Therefore, precise dispensing technology is needed in the rubber industry. Avoid excessive amounts of glue when dispensing, resulting in poor product.

Today's dispensing technology drives a screw by a transmission and uses the threaded portion of the surface of the screw to push the gel to allow the gel to flow out of the needle. Although today's dispensing technology has been able to accurately inject the colloid into the correct position, The plastic needle used in the needle today, as shown in Fig. 4 and Fig. 5, in the dispensing process, the transmission drive screw 90 rotates to move the colloid 91 toward the needle 92A. When the gel 91 fills the needle 92A, the colloid The pressure of the filling of 91 is easy to cause the needle 92A to be deformed due to insufficient rigidity of the plastic material. Therefore, the actual amount of glue is less than the required amount of glue, so that the amount of glue is insufficiently accurate, and the advantage of the plastic needle is The unit price is cheap. If it is blocked, it can be discarded directly, and the new product is replaced. The disadvantage is that the rigidity of the plastic material is insufficient to cause deformation, and the amount of glue can not be accurately controlled.

The needle 92A is also changed to a hard material in the market. As shown in FIG. 6, the needle B is made of a hard material. When the gel 91 fills the needle 92B, the needle B does not deform, and when the screw 90 rotates, The colloid 91 is sent to the needle 92B and flows out through the outlet of the needle 92B. However, the screw 90 is too far away from the outlet of the needle 92B, so that the colloid 91 remains in the inner space of the needle 92B, thereby affecting the accuracy of each dispensing. As a result, the amount of glue produced cannot be precisely controlled.

The main purpose of this creation is to provide a precision screw dispensing valve, which is used to improve the deformation of the needle when filling the gel, resulting in insufficient precision of the glue output, and to achieve precise control of the amount of glue.

In order to achieve the purpose of the prior disclosure, the precision screw dispensing valve of the present invention comprises: a casing, the inside of which forms an accommodating space, a glue passage, a glue passage and a sleeve space, and the accommodating space communicates with the glue a passage, the glue passage communicates with the sleeve space, the sleeve space communicates with the surface of the outer casing to form an opening, the glue passage communicates with the glue passage, and the glue passage forms a glue inlet on the surface of the shell a glue body disposed on the outer casing and including a transmission device and a screw, the transmission device being disposed on the outer casing, the screw connecting the transmission device and extending into the rubber discharge passage and the sleeve space, the screw a threaded portion is disposed on a surface of the glue outlet passage and the sleeve space; a one-point rubber head assembly is disposed outside the opening of the outer casing, the dispensing head assembly includes a fixing unit and a needle, and the fixing unit is disposed Outside the opening of the outer casing, the needle is fixed under the opening by the fixing unit, a hole is arranged inside the needle; and a sleeve is disposed in the sleeve space of the outer casing and extends into the sleeve In the needle of the dispensing head assembly, the sleeve is a rigid member, the end of the sleeve is adjacent to the end of the needle, and the sleeve has a first flow path and a second flow path, and the first flow path is located at the end The needle is connected to the perforation, the second flow passage is connected to the first flow passage, the threaded portion of the screw extends into the second flow passage, and the second flow passage communicates with the rubber discharge passage, wherein the first flow passage communicates with the perforation It is the first runner.

The rubber inlet of the outer casing can be connected to a connecting pipe, and the other end of the connecting pipe is connected with a rubber cylinder filled with a colloid, and the colloid can pass through the rubber inlet to enter the rubber passage. The transmission device can drive the screw to rotate the screw, and the threaded portion of the surface of the screw drives the colloid to move toward the sleeve, so that the colloid flows through the sleeve and flows out from the perforation of the needle, due to the sleeve The cylinder is a hard member, so when the colloid is filled in the sleeve, the pressure of the colloid filling is not easy to deform the sleeve, and the sleeve extends into the needle, thereby reducing the pressure applied to the needle when the colloid is filled, so The needle is not easily deformed, so the accuracy of the glue amount can be improved.

Moreover, since the precision screw dispensing valve of the present invention is used together with the sleeve and the needle, if the needle has a residual solidified colloid, which causes the needle to be clogged, the needle can be directly replaced, and the needle can be cleaned. The time of the internal colloid.

Referring to FIG. 1 , a preferred embodiment of the precision screw 21 dispensing valve of the present invention comprises a housing 10 , a glue supply body 20 , a dot plastic head assembly 30 and a sleeve 40 .

The housing 10 defines an accommodating space 11 , a glue passage 12 , a glue passage 13 and a sleeve space 16 . The accommodating space 11 communicates with the glue passage 12 , and the glue passage 12 communicates with the sleeve. The space 16 is connected to the surface of the casing 10 to form an opening 14. The glue passage 13 communicates with the glue passage 12, and the glue passage 13 forms a glue inlet 15 on the surface of the casing 10.

The glue supply body 20 is disposed on the outer casing 10 and includes a transmission device 22 and a screw 21. The transmission device 22 is disposed on the outer casing 10. The screw 21 is connected to the transmission device 22 and extends into the rubber discharge passage 12 and the sleeve. The cylindrical space 16 is provided with a threaded portion 23 on the surface of the rubber discharge passage 12 and the sleeve space 16.

The dispensing head assembly 30 is disposed outside the opening 14 of the housing 10. The dispensing head assembly 30 includes a fixing unit 31 and a needle 32. The fixing unit 31 is disposed outside the opening 14 of the housing 10. The needle 32 is fixed under the opening 14 by the fixing unit 31, and a through hole 33 is disposed inside the needle 32.

The sleeve 40 is disposed in the sleeve space 16 of the outer casing 10 and extends into the needle 32 of the dispensing head assembly 30. The sleeve 40 is a rigid member, and the end of the sleeve 40 is adjacent to the end of the needle 32. The sleeve 40 has a first flow path 41 and a second flow path 42. The first flow path 41 is located at the needle 32 and communicates with the through hole 33. The second flow path 42 communicates with the glue passage 12, the second The flow passage 42 communicates with the first flow passage 41, and the threaded portion 23 of the screw 21 extends into the second flow passage 42. The first flow passage 41 communicates with the through hole 33 as a first flow passage opening 411, wherein the sleeve 40 is The material can be metal, ceramic or carbon fiber.

In addition, the transmission device 22 includes a transmission member 221 , a coupling 222 and a plurality of bearings 223 . The transmission member 221 is disposed on the outer casing 10 , and the coupling 222 is coupled to the transmission member 221 and connected to the screw 21 . The bearing member 221 is disposed on the coupling 222, and the transmission member 221 is a motor, and the glue supply body 20 includes an upper check ring 24 and a lower check ring 25, and the upper check ring 24 is disposed on the glue The lower end ring 25 is disposed between the sleeve 40 and the outer casing 10 at a communication between the passage 12 and the accommodating space 11.

As shown in FIG. 2, the glue inlet 15 of the outer casing 10 can be connected to a communication tube 50. The communication tube 50 is connected to a rubber cylinder 51. The rubber cylinder 51 has a glue space inside, wherein the glue space is filled. The colloid 52 flows from the rubber tube 51 through the communication tube 50 and flows into the glue passage 13 , and then flows into the glue passage 12 from the glue passage 13 .

As shown in FIG. 2 and FIG. 3, when the user uses the precision screw 21 dispensing valve, the transmission member 221 drives the coupling 222 and rotates the screw 21, so the threaded portion 23 of the surface of the screw 21 will The driving glue 52 moves along the rubber discharge passage 12 to the second flow passage 42 and the first flow passage 41, and the colloid 52 flows through the second flow passage 42 of the sleeve 40 and the first flow passage 41 and from the needle 32. The perforation 33 flows out, wherein the upper check ring 24 prevents the colloid 52 from penetrating into the accommodating space 11, and the lower check ring 25 prevents the colloid 52 from penetrating between the sleeve 40 and the outer casing 10.

As shown in FIG. 3, wherein the second flow path 42 of the sleeve 40 extends into the threaded portion 23 of the screw 21, and the second flow path 42 communicates with the first flow path 41, when the screw 21 rotates, The colloid 52 is driven by the threaded portion 23 of the screw 21 and flows from the second flow passage 42 to the first flow passage 41. Since the sleeve 40 is a hard member and does not deform, the amount of glue can be accurately controlled.

In summary, since the sleeve 40 is a hard member, when the colloid 52 is filled in the sleeve 40, the pressure filled by the colloid 52 is not easy to deform the sleeve 40, and the sleeve 40 extends into the needle 32. The pressure of the needle 52 can be reduced when the gel 52 is filled, so that the needle 32 is not easily deformed, thereby improving the precision of the glue amount. In addition, since the precision screw dispensing valve of the present invention is matched with the sleeve 40 and the The needle 32 is used together, and the needle 32 of the precision screw dispensing valve of the present invention is made of a lower cost plastic material. If the perforation 33 of the needle 32 has a solidified gel 52, which causes clogging and cannot be used, the replacement can be directly replaced. The needle 32 reduces the time required to clean the inner gel 52 of the needle 32.

10‧‧‧ Shell
11‧‧‧ accommodating space
12‧‧‧Glue passage
13‧‧‧Into the rubber channel
14‧‧‧ openings
15‧‧‧Inlet
16‧‧‧Sleeve space
20‧‧‧Supply body
21‧‧‧ screw
22‧‧‧Transmission
23‧‧‧Threading Department
221‧‧‧ transmission parts
222‧‧‧Coupling
223‧‧‧ bearing
24‧‧‧Stop loopback
25‧‧‧Next loopback
30‧‧‧ Dispensing head assembly
31‧‧‧Fixed unit
32‧‧‧ needle
33‧‧‧Perforation
40‧‧‧ sleeve
41‧‧‧First runner
411‧‧‧ first runner
42‧‧‧Second runner
50‧‧‧Connected pipe
51‧‧‧Cylinder
52‧‧‧colloid
90‧‧‧ screw
91‧‧‧colloid
92A‧‧ needles
92B‧‧ needles

Figure 1 is a schematic cross-sectional view showing a preferred embodiment of the precision screw dispensing valve of the present invention. Figure 2 is a schematic view showing the overall use of a preferred embodiment of the precision screw dispensing valve of the present invention. Figure 3 is a schematic view showing the use of a preferred embodiment of the precision screw dispensing valve of the present invention. Figure 4: Schematic diagram of a conventional plastic needle (1). Figure 5: Schematic diagram of a cross section of a conventional plastic needle (2). Figure 6: Schematic diagram of a cross section of a conventional hard needle (3).

10‧‧‧ Shell

11‧‧‧ accommodating space

12‧‧‧Glue passage

13‧‧‧Into the rubber channel

14‧‧‧ openings

15‧‧‧Inlet

16‧‧‧Sleeve space

20‧‧‧Supply body

21‧‧‧ screw

22‧‧‧Transmission

23‧‧‧Threading Department

221‧‧‧ transmission parts

222‧‧‧Coupling

223‧‧‧ bearing

24‧‧‧Back loop

25‧‧‧Next loopback

30‧‧‧ Dispensing head assembly

31‧‧‧Fixed unit

32‧‧‧ needle

33‧‧‧Perforation

40‧‧‧ sleeve

41‧‧‧First runner

411‧‧‧ first runner

42‧‧‧Second runner

50‧‧‧Connected pipe

51‧‧‧Cylinder

Claims (4)

A precision screw dispensing valve comprises: a housing, an interior of which forms an accommodating space, a glue outlet passage, a glue passage and a sleeve space, wherein the accommodating space communicates with the glue passage, the glue passage Connecting the sleeve space, the sleeve is connected to the surface of the outer sleeve to form an opening, the glue passage is connected to the glue passage, and the glue passage forms a glue inlet on the surface of the outer casing; The screw is disposed in the outer casing and includes a transmission device and a screw. The transmission device is disposed on the outer casing, and the screw is connected to the transmission device and extends into the rubber discharge passage and the sleeve space. The surface of the sleeve space is provided with a threaded portion; the one-point rubber head assembly is disposed outside the opening of the outer casing, the dispensing head assembly comprises a fixing unit and a needle, and the fixing unit is disposed at the opening of the outer casing The needle is fixed under the opening by the fixing unit, the needle is internally provided with a through hole, and a sleeve is disposed in the sleeve space of the outer casing and extends into the needle of the dispensing head assembly In the head, the sleeve is a rigid member, the end of the sleeve is adjacent to the end of the needle, and the sleeve has a first flow passage and a second flow passage, and the first flow passage is located at the needle and communicates with the through hole. The second flow passage communicates with the first flow passage, the threaded portion of the screw extends into the second flow passage, and the second flow passage communicates with the rubber discharge passage, wherein the first flow passage communicates with the perforation as a first flow passage opening. The precision screw dispensing valve of claim 1, wherein the transmission device comprises a transmission member, a coupling and a plurality of bearings, the transmission member is assembled to the outer casing, and the coupling is coupled to the transmission member and connected The screw is sleeved on the coupling. The precision screw dispensing valve of claim 2, wherein the transmission member is a motor. The precision screw dispensing valve according to any one of claims 1 to 3, wherein the glue supply body comprises an upper check ring and a lower check ring, and the upper check ring is disposed in the glue discharge passage and the accommodating space. In the communication, the lower check ring is disposed between the sleeve and the outer casing.