Low-temperature pin type machine barrel

Abstract

A low-temperature pin type machine barrel comprises a barrel body, machine barrel openings are formed in the two ends of the barrel body respectively, pin hole sets capable of being connected with pins in an inserted mode are distributed in the barrel body in the axial direction at intervals, each pin hole set is composed of pin holes distributed in the circumferential direction at intervals, and a cooling channel is axially formed in the position, between the pin holes, of the barrel body. A cooling liquid inlet of the cooling channel is formed in one end of the cylinder body, a cooling liquid outlet of the cooling channel is formed in the other end of the cylinder body, an annular cavity is formed in the cylinder body between the pin hole groups, and the annular cavity is communicated with a channel inner cavity of the cooling channel. The low-temperature pin type machine barrel has the advantages that the annular cavity is additionally arranged on the basis of the cooling channel, and the heat conduction area between cooling liquid and materials is increased, so that the heat exchange area is increased, the cooling efficiency of the low-temperature pin type machine barrel is improved, the temperature of discharged glue is reduced, the cooling effect is good, and the temperature requirement of the discharged glue is easily met.

Description

Technical Field

[0001] The utility model relates to the technical field of a pin-type barrel, in particular to a low-temperature pin-type barrel. Background Art

[0002] There is a Chinese invention patent application with application number CN201410488356.4 and titled "A Low-temperature Feeding Rubber Extruder Barrel", which discloses a low-temperature feeding rubber extruder barrel, comprising a plasticizing section barrel and an extrusion section barrel. The invention patent application is characterized in that the plasticizing section barrel and the extrusion section barrel are socketed with each other, and the length ratio of the plasticizing section barrel to the extrusion section barrel is 1:2. A plasticizing section cooling barrel is further fixed on the inner wall of the plasticizing section barrel, and the diameter ratio of the plasticizing section cooling barrel to the plasticizing section barrel is 1:0.8. An extrusion section cooling barrel is further provided on the inner wall of the extrusion section barrel, and the diameter ratio of the extrusion section cooling barrel to the extrusion section barrel is 1:0.8. Plasticizing section pins and extrusion section pins are evenly provided on the inner walls of the plasticizing section barrel and the extrusion section barrel, respectively, and the number of extrusion section pins on the inner wall of the extrusion section barrel is 1.5-2.5 times the number of plasticizing section pins on the inner wall of the plasticizing section barrel. This invention features a simple structure, ease of use, rational design, and low cost. It not only reduces backflow and leakage flow, but also shortens the residence time of the rubber material within the barrel, effectively lowering the extrusion temperature and significantly improving extrusion production capacity. However, the barrel wall cooling area could be increased, and the cooling effect could be further improved, so further improvements are needed to the barrel structure. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a low-temperature pin-type barrel which can increase the cooling area of ​​the barrel wall and has a good cooling effect in response to the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above technical problems is as follows: the low-temperature pin-type barrel comprises a barrel, with barrel openings respectively provided at both ends of the barrel, pin hole groups for inserting pins distributed axially at intervals on the barrel, each pin hole group consists of pin holes distributed circumferentially at intervals, a cooling channel is axially provided on the barrel between the pin holes, a coolant inlet of the cooling channel is provided at one end of the barrel, and a coolant outlet of the cooling channel is provided at the other end of the barrel, and is characterized in that an annular cavity is provided on the barrel between the pin hole groups, and the annular cavity is communicated with the channel inner cavity of the cooling channel.

[0005] As an improvement, an annular cavity may preferably be provided between every two adjacent pin hole groups.

[0006] As a further improvement, an annular groove may be preferably provided on the cylinder between any adjacent pin hole groups, wherein the annular groove is connected to the cooling channel, and an annular sleeve is covered on the opening of the annular groove, wherein the annular sleeve seals the opening of the corresponding annular groove, and the inner wall of the annular sleeve and the inner wall of the annular groove constitute the annular cavity.

[0007] As a further improvement, both ends of the top surface of the annular sleeve may be preferably provided with annular notches, and sealing rings are embedded in the notches.

[0008] As a further improvement, the notch portion may preferably be an inverted trapezoidal structure with a wider upper opening and a narrower lower opening.

[0009] As an improvement, connecting flanges may preferably be provided at both ends of the cylinder.

[0010] As a further improvement, the coolant inlet may be preferably provided on a connecting flange at one end of the barrel, and the coolant outlet may be preferably provided on a connecting flange at the other end of the barrel.

[0011] As a further improvement, the cooling channels may preferably be multiple, circumferentially spaced apart on the cylinder between the pins, one end of the multiple cooling channels being connected through a first annular connecting cavity provided in the cylinder, the first connecting cavity being connected to the coolant inlet, the other end of the multiple cooling channels being connected through a second annular connecting cavity provided in the cylinder, the second connecting cavity being connected to the coolant outlet.

[0012] As an improvement, an annular protrusion may be preferably provided at one end of the barrel, and an annular groove may be preferably provided at the other end of the barrel. The protrusion of the low-temperature pin-type barrel can be inserted into the groove of another low-temperature pin-type barrel of the same structure to make the two low-temperature pin-type barrels fit together into an integral structure.

[0013] As an improvement, the pin holes may preferably be stepped holes with a larger width at the top and a smaller width at the bottom, and each group of pin holes may be evenly spaced.

[0014] Compared with the existing technology, the advantages of the present invention are: an annular cavity is added on the basis of the cooling channel, which increases the heat conduction area between the coolant and the material, thereby increasing the heat exchange area, improving the cooling efficiency of the low-temperature pin-type barrel, thereby reducing the glue outlet temperature, achieving a good cooling effect, and making it easier to meet the glue outlet temperature requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A perspective view of an embodiment of the present utility model;

[0016] Figure 2 for Figure 1 Front projection of

[0017] Figure 3 yes Figure 2 Sectional view along line AA;

[0018] Figure 4 yes Figure 2 The cross-section along line BB;

[0019] Figure 5 yes Figure 2 Cross-section along line CC;

[0020] Figure 6 yes Figure 3 Cross-section along line DD. DETAILED DESCRIPTION

[0021] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1 to 6 As shown, the low-temperature pin-type barrel of this embodiment includes a barrel 1 with barrel openings at both ends. Pin hole groups for receiving pins are axially spaced apart on the barrel 1. Each pin hole group consists of circumferentially spaced pin holes 11. A cooling channel 12 is axially disposed on the barrel 1 between the pin holes 11. A coolant inlet 121 for the cooling channel 12 is disposed at one end of the barrel, and a coolant outlet 122 for the cooling channel 12 is disposed at the other end. An annular cavity 13 is disposed on the barrel 1 between the pin hole groups, communicating with the inner cavity of the cooling channel 12. The pin holes 11 are stepped holes with a larger width at the top and a smaller width at the bottom. Each group of pin holes is evenly spaced.

[0023] An annular cavity 13 is provided between every two adjacent pin hole groups. An annular groove is provided on the cylinder 1 between any adjacent pin hole groups. The annular groove is connected to the cooling channel 12. An annular sleeve 14 is covered on the opening of the annular groove. The annular sleeve seals the opening of the corresponding annular groove. The inner wall of the annular sleeve 14 and the inner wall of the annular groove form an annular cavity 13. Annular notches are provided at both ends of the top surface of the annular sleeve 14, and a sealing ring 15 is embedded in the notch. The notch is an inverted trapezoidal structure with a wide upper opening and a narrow lower opening. The annular sleeve 14 can adopt a structure in which half and half are matched. The two matched structures are spliced ​​and fixed together by welding to form the annular sleeve 14.

[0024] Connecting flanges 16 are provided at each end of the barrel 1. A coolant inlet 121 is provided on the connecting flange 16 at one end of the barrel, and a coolant outlet 122 is provided on the connecting flange 16 at the other end of the barrel. Multiple cooling channels 12 are provided, circumferentially spaced apart on the barrel 1 between the pins. One end of each of the cooling channels 12 is connected through an annular first connecting cavity 17 provided in the barrel 1, which communicates with the coolant inlet 121. The other ends of each of the cooling channels 12 are connected through an annular second connecting cavity 18 provided in the barrel 1, which communicates with the coolant outlet 122. An annular protrusion 19 is provided at one end of the barrel 1, and an annular groove 10 is provided at the other end of the barrel 1. The protrusion 19 of a low-temperature pin-type barrel can be inserted into the groove 10 of another low-temperature pin-type barrel of the same structure, allowing the two low-temperature pin-type barrels to be combined into a single unit.

Claims

1. A low-temperature pin-type barrel, comprising a barrel (1), barrel openings are respectively provided at both ends of the barrel (1), pin hole groups capable of receiving pins are axially spaced apart on the barrel (1), each pin hole group is composed of pin holes (11) spaced apart circumferentially, a cooling channel (12) is axially provided on the barrel (1) between the pin holes (11), a cooling liquid inlet (121) of the cooling channel (12) is provided at one end of the barrel, and a cooling liquid outlet (122) of the cooling channel (12) is provided at the other end of the barrel, characterized in that: An annular cavity (13) is provided on the cylinder (1) between the pin hole groups, and the annular cavity (13) is communicated with the channel inner cavity of the cooling channel (12).

2. The low-temperature pin-type barrel according to claim 1, characterized in that: An annular cavity (13) is provided between every two adjacent pin hole groups.

3. The low-temperature pin-type barrel according to claim 2, characterized in that: An annular groove is provided on the cylinder (1) between any adjacent pin hole groups, the annular groove being connected to the cooling channel (12), an annular sleeve (14) is covered on the opening of the annular groove, the annular sleeve seals the opening of the corresponding annular groove, and the inner wall of the annular sleeve (14) and the inner wall of the annular groove form the annular cavity (13).

4. The low-temperature pin-type barrel according to claim 3, characterized in that: Annular notches are respectively provided at both ends of the top surface of the annular sleeve (14), and sealing rings (15) are embedded in the notches.

5. The low-temperature pin-type barrel according to claim 4, characterized in that: The notch is an inverted trapezoidal structure with a wider upper opening and a narrower lower opening.

6. The low-temperature pin-type barrel according to any one of claims 1 to 5, characterized in that: Connecting flanges (16) are respectively provided at both ends of the cylinder (1).

7. The low-temperature pin-type barrel according to claim 6, characterized in that: The cooling liquid inlet (121) is arranged on a connecting flange (16) at one end of the barrel, and the cooling liquid outlet (122) is arranged on a connecting flange (16) at the other end of the barrel.

8. The low-temperature pin-type barrel according to claim 7, characterized in that: There are a plurality of cooling channels (12), which are circumferentially spaced and distributed on the cylinder (1) between the pins. One end of the plurality of cooling channels (12) is connected through an annular first communicating cavity (17) provided in the cylinder (1), and the first communicating cavity (17) is connected to a cooling liquid inlet (121). The other end of the plurality of cooling channels (12) is connected through an annular second communicating cavity (18) provided in the cylinder (1), and the second communicating cavity (18) is connected to a cooling liquid outlet (122).

9. The low-temperature pin-type barrel according to any one of claims 1 to 5, characterized in that: An annular protrusion (19) is provided at one end of the barrel (1), and an annular groove (10) is provided at the other end of the barrel (1). The protrusion (19) of the low-temperature pin-type barrel can be inserted into the groove (10) of another low-temperature pin-type barrel of the same structure, so that the two low-temperature pin-type barrels are combined into an integral structure.

10. The low-temperature pin-type barrel according to any one of claims 1 to 5, characterized in that: The pin holes (11) are stepped holes with a larger width at the top and a smaller width at the bottom, and each group of pin holes is evenly spaced.

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