BLOW MOLDING MACHINE SUITABLE FOR MANUFACTURING A BOTTLE HAVING A HANDLE AND METHOD FOR USING THE SAME

Abstract

A blow molding machine suitable for manufacturing the bottle having the handle and a method for using the same, wherein each of the preform holders has a local temperature regulating device, the local temperature regulating devices are disposed around the handle portion, the rotary joint supplies liquid or gas continuously to the local temperature regulating devices of the preform holders to perform continuous temperature regulation for the handle portion, thereby overcoming the problem that the temperature needs to be immediately cooled after the injection molding, and temperature of the body portion can be maintained, so as to achieve the purpose of reducing energy consumption.

Claims

1. A blow molding machine suitable for manufacturing a bottle having a handle, being applicable to a bottle preform having a handle portion, and the blow molding machine suitable for manufacturing the bottle having the handle comprising: a machine, an injection device, a blowing device and a rotary joint, wherein the injection device and the blowing device are disposed around the machine; the machine includes a turntable, and the rotary joint rotates along with the turntable and serves to supply fluid to cool the handle portion.

2. The blow molding machine suitable for manufacturing the bottle having the handle as claimed in claim 1, wherein the turntable has a plurality of worktables, each of the worktables includes at least one preform holder, each of the preform holders is provided for holding the bottle preform injection molded by the injection device, and the rotary joint serves to supply the fluid to the preform holders.

3. The blow molding machine suitable for manufacturing the bottle having the handle as claimed in claim 2, wherein the rotary joint is disposed on the turntable and in communication with each of the preform holders of the worktables.

4. The blow molding machine suitable for manufacturing the bottle having the handle as claimed in claim 1, wherein the fluid is liquid or gas.

5. The blow molding machine suitable for manufacturing the bottle having the handle as claimed in claim 2, wherein the bottle preform is processed into the bottle having the handle, and includes a body portion connected to the handle portion, each of the preform holders has a local temperature regulating device, the rotary joint is provided for supplying liquid or gas to each of the local temperature regulating devices, and the local temperature regulating devices are disposed around the handle portion; by such arrangements, the rotary joint continuously supplies the fluid to the local temperature regulating devices to perform continuous temperature regulation for the handle portion, the blowing device is disposed around the handle portion, then the body portion is injected with gas to blow the bottle perform into the bottle having the handle.

6. The blow molding machine suitable for manufacturing the bottle having the handle as claimed in claim 5, wherein the injection device has an injection body and a preform mold, the preform mold is disposed under the turntable, the preform mold is aligned with a corresponding one of the worktables, the injection body is connected to the preform mold and cooperates with the corresponding one of the worktables to form the bottle preform on each of the preform holders; the blowing device is disposed below the turntable, aligned with another corresponding one of the worktables, and has a first mold and a second mold which are movable relative to each other and disposed around the body portion.

7. The blow molding machine suitable for manufacturing the bottle having the handle as claimed in claim 5, wherein the body portion has a bottle thickness, and the handle portion has a handle thickness which is greater than the bottle thickness.

8. The blow molding machine suitable for manufacturing the bottle having the handle as claimed in claim 7, wherein the body portion has an inner surface and an outer surface, the inner surface extends to the outer surface by an extension length which is the bottle thickness, and the handle thickness is defined as an extension length between two opposite sides of the handle portion.

9. The blow molding machine suitable for manufacturing the bottle having the handle as claimed in claim 5, wherein the rotary joint is in communication with the local temperature regulating device.

10. A method for using the blow molding machine suitable for manufacturing the bottle having the handle as claimed in claim 6, comprising: an injection molding step including injection molding the bottle preform between the preform mold and the corresponding one of the worktables by using the injection body, wherein the bottle preform has the body portion and the handle portion, and a thickness of the handle portion is larger than a thickness of the body portion, then, wrapping the local temperature regulating devices around the handle portion; a local cooling step including using the rotary joint to supply liquid or gas continuously to the local temperature regulating devices of the preform holders to perform continuous temperature regulation for the handle portion; and a local blow molding step including closing the first mold and the second mold, making the body portion of the bottle preform located between the first mold and the second mold, and blowing the bottle preform into the bottle having the handle by injecting high pressure gas into the body portion.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG. 1 is an illustrative view of a conventional blow molding machine;

[0025] FIG. 2 is an illustrative view of the blow molding machine suitable for manufacturing a bottle having a handle in accordance with the present invention;

[0026] FIG. 3 is a perspective view of a bottle having a handle made by the blow molding machine of the invention;

[0027] FIG. 4 is a cross sectional view of the bottle having a handle made by the blow molding machine of the invention; and

[0028] FIG. 5 is a flow chart view of the method for using the blow molding machine suitable for manufacturing a bottle having a handle in accordance with the invention.

DETAILED DESCRIPTION

[0029] The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.

[0030] Referring to FIGS. 2-4, a blow molding machine suitable for manufacturing a bottle having a handle in accordance with the present invention comprises: a machine 10, an injection device 20, a blowing device 30 and a rotary joint 50, wherein the injection device 20 and the blowing device 30 are disposed around the machine 10.

[0031] The machine 10 includes a turntable 11 having a plurality of worktables 12, each of which is equiangularly disposed on the turntable 11, and each of the worktables 12 includes at least one preform holder 121. Each of the preform holders 121 is provided for holding a bottle preform P, and each of the preform holders 121 has a local temperature regulating device 121A.

[0032] The rotary joint 50 is disposed on and rotates along with the turntable 11, and is in communication with each of the preform holders 121 of the worktables 12. Preferably, the rotary joint 50 is in communication with the local temperature regulating device 121A. The rotary joint 50 is provided for supplying liquid or gas to each of the local temperature regulating devices 121A to perform continuous temperature regulation for the handle portion P2. In an embodiment, the liquid is cooling water.

[0033] The injection device 20 has an injection body 21 and a preform mold (not shown). The preform mold is disposed under the turntable 11, and the preform mold is aligned with one of the worktables 12. The injection body 21 is connected to the preform mold, and cooperates with the corresponding worktable 12 to form the bottle preform P on each of the preform holders 121. The method of injection molding the bottle preform P is prior art, the details of which are not explained in detail.

[0034] The bottle preform P includes: a body portion P1 and a handle portion P2 connected to the body portion P1, and the body portion P1 has an inner surface IS and an outer surface OS. The inner surface IS extends to the outer surface OS by an extension length which is a bottle thickness D1. The handle portion P2 is solid, and has a handle thickness D2 which is defined as an extension length between two opposite sides of the handle portion P2. The handle thickness D2 is greater than the bottle thickness D1, and the local temperature regulating devices 121A of each of the preform holders 121 are disposed around each of the handle portions P2 to perform continuous temperature regulation for the handle portion P2.

[0035] The blowing device 30 is disposed below the turntable 11, aligned with a corresponding one of the worktables 12, and has a first mold 31 and a second mold 32 which are movable relative to each other. The number of the mold holes of the first mold 31 and that of the second mold 32 correspond to the number of the preform holders 121. The first mold 31 and the second mold 32 are disposed around the body portion P.

[0036] In a preferred embodiment, the present invention further includes a gripping device 40 disposed around the machine 10 to grab the bottle having a handle formed by the blow molding process.

[0037] The present invention further provides a method for using the blow molding machine suitable for manufacturing a bottle having a handle, as shown in FIG. 5, comprising: [0038] an injection molding step S1 including injection molding the bottle preform P between the preform mold and a corresponding one of the worktables 12 by using the injection body 21, wherein the bottle preform P has the body portion P1 and the handle portion P2, and a thickness of the handle portion P2 is larger than a thickness of the body portion P1, then, wrapping the local temperature regulating devices 121A around the handle portion P2; [0039] a local cooling step S2 including using the rotary joint to supply liquid or gas continuously to the local temperature regulating devices 121A of each of the preform holders 121 to perform continuous temperature regulation for the handle portion P2; and [0040] a local blow molding step S3 including closing the first mold 31 and the second mold 32, so that the body portion P1 of the bottle preform P is located between the first mold 31 and the second mold 32, then, blowing the bottle preform P into a bottle having the handle by injecting high pressure gas into the body portion P1.

[0041] While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.