Die clamping unit for injection molding machine

Abstract

The utility model discloses a mold clamping unit for an injection molding machine. The mold clamping unit comprises a machine base, a mold, a fixing frame, a crank mechanism and a driving mechanism, the machine base comprises a base body and four guide columns arranged on the base body. The mold can be movably arranged on the four guide pillars in a penetrating manner back and forth; the toggle mechanism is arranged in the toggle space, one end of the toggle mechanism is in shaft connection with the seat body, and the other end of the toggle mechanism abuts against the back face of the mold; and the driving mechanism is arranged on the fixed frame. The fixing frame is arranged between the mold and the seat body, the driving mechanism is arranged on the fixing frame in a matched mode, the driving end of the driving mechanism is connected with the mold and drives the mold to move back and forth, compared with a traditional injection molding machine, the driving mechanism is arranged on the fixing frame instead of the rear end of a machine body, and the length of the injection molding machine is effectively shortened; and moreover, the folding surface of the toggle mechanism is outward, so that when the mold opening stroke is prolonged, whether the toggle space has enough space for temporarily storing the connecting rod does not need to be considered, and the whole injection molding machine is more compact.

Description

Technical Field

[0001] The utility model relates to the technology in the field of injection molding machines, in particular to a clamping die unit for an injection molding machine. Background Art

[0002] An injection molding machine is also known as an injection molding machine or an injection machine. Many factories call it a molding machine, and the injection molded products are called molded parts. It is the main molding equipment for making various shaped plastic products from thermoplastic or thermosetting materials using plastic molding dies. According to the arrangement of the injection device and the clamping die device, the injection molding machine can be divided into vertical, horizontal and vertical-horizontal compound types.

[0003] The existing injection molding machines are relatively long in length and occupy too much factory building area. Therefore, it is necessary to propose a solution to solve the above problems. Content of the Utility Model

[0004] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present utility model is to provide a clamping die unit for an injection molding machine, which can effectively solve the problem that the existing injection molding machine is relatively long in length and occupies too much factory building area.

[0005] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0006] A clamping die unit for an injection molding machine includes a machine base, a mold, a fixed frame, a toggle mechanism and a driving mechanism; the machine base includes a base body and four guide columns arranged on the base body. The four guide columns are respectively arranged at the corners of the base body, and the four guide columns enclose a toggle space; the mold is movably arranged on the four guide columns in a back-and-forth manner; the fixed frame is arranged on the four guide columns and is located between the mold and the base body; the toggle mechanism is arranged in the toggle space, one end of the toggle mechanism is axially connected to the base body, and the other end of the toggle mechanism abuts against the back of the mold; the driving mechanism is arranged on the fixed frame, and the driving end of the driving mechanism is connected to the mold and drives the mold to move back and forth, thereby driving the toggle mechanism to open or close.

[0007] As a preferred solution, the other end of the toggle mechanism abuts against the middle position of the back of the mold, so that the mold is more evenly stressed and not easily deformed.

[0008] As a preferred solution, a contact portion extends backward from the middle position of the back of the mold, and the other end of the toggle mechanism abuts against the contact portion. The design of the contact portion enhances the strength of the mold, and it is not easily deformed even under long-term stress.

[0009] As a preferred solution, there are two driving mechanisms, and the two driving mechanisms are respectively arranged on the left and right sides of the fixed frame.

[0010] As a preferred solution, the driving mechanism is an oil cylinder.

[0011] As a preferred solution, it further includes an adjustment mechanism. The adjustment mechanism includes four first gears and one second gear. The four first gears are respectively screwed to the rear ends of the four guide posts. Each of the four first gears has a plurality of first tooth portions. The second gear is arranged on the seat body. The second gear has a plurality of second tooth portions. The second tooth portions are adapted to the first tooth portions. The second gear meshes with the four first gears. The second gear meshes with the four first gears simultaneously, and by respectively screwing the four first gears to the rear ends of the four guide posts, the distances that the four guide posts protrude forward from the seat body are adjusted simultaneously, which is more consistent.

[0012] As a preferred solution, the toggle mechanism includes a first connecting rod, a second connecting rod, a movable wall and a third connecting rod; one end of the first connecting rod is pivotally connected to the seat body, one end of the second connecting rod is pivotally connected to the other end of the first connecting rod, one end of the movable wall is pivotally connected to the other end of the second connecting rod, the other end of the movable wall abuts against the back surface of the mold, one end of the third connecting rod is pivotally connected to the middle of the second connecting rod, and the other end of the third connecting rod is pivotally connected to the fixed frame; when the driving mechanism drives the mold to move forward, the first connecting rod closes inward, the second connecting rod opens outward, so that the first connecting rod and the second connecting rod are parallel to the horizontal plane, and the movable wall moves forward; when the driving mechanism drives the mold to move backward, the first connecting rod opens outward, the second connecting rod closes inward, and the movable wall moves backward.

[0013] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solutions:

[0014] By arranging a fixed frame between the mold and the seat body, and then cooperating with arranging the driving mechanism on the fixed frame, the driving end of the driving mechanism is connected to the mold and drives the mold to move back and forth. Compared with the traditional injection molding machine, the driving mechanism is arranged on the fixed frame instead of the rear end of the machine body, effectively shortening the length of the injection molding machine; and, the fold surface of the toggle mechanism faces outward. When extending the mold opening stroke, there is no need to consider whether there is enough space in the toggle space for temporarily storing the connecting rod, making the overall injection molding machine more compact.

[0015] To more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail below with reference to the drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an assembled three-dimensional schematic diagram of a preferred embodiment of the present invention;

[0017] Figure 2 is an assembled three-dimensional schematic diagram of another angle of a preferred embodiment of the present invention;

[0018] Figure 3 is a partial assembled schematic diagram of a preferred embodiment of the present invention.

[0019] Description of the accompanying drawings:

[0020] 10. Base 101, elbow space

[0021] 11. Seat 12. Guide column

[0022] 20. Mould 30. Fixing frame

[0023] 40. Toggle mechanism 41. First connecting rod

[0024] 42. Second connecting rod 43. Movable wall

[0025] 44. Third connecting rod 50. Driving mechanism

[0026] 60. Adjustment mechanism 61. First gear

[0027] 611, first tooth portion 62, second gear

[0028] 621. Second tooth portion. DETAILED DESCRIPTION

[0029] Please refer to Figures 1 to 3 As shown, it shows the specific structure of a preferred embodiment of the utility model, including a base 10, a mold 20, a fixing frame 30, a toggle mechanism 40 and a driving mechanism 50.

[0030] The base 10 includes a base body 11 and four guide pillars 12 disposed on the base body 11 . The four guide pillars 12 are respectively disposed at corners of the base body 11 , and the four guide pillars 11 surround and form an elbow space 101 .

[0031] The mold 20 can be movably arranged on the four guide pillars 12 back and forth. In this embodiment, a resistance part 21 is extended backward from the middle of the back side of the mold 20. The design of the resistance part 21 enhances the strength of the mold 20 and makes it less likely to deform even under long-term stress.

[0032] The fixing frame 30 is disposed on the four guide pillars 12 and is located between the mold 20 and the base 11 .

[0033] The toggle mechanism 40 is arranged within the toggle space 101. One end of the toggle mechanism 40 is pivotally connected to the base body 11, and the other end of the toggle mechanism 40 abuts against the back surface of the mold 20. The toggle mechanism 40 includes a first connecting rod 41, a second connecting rod 42, a movable wall 43, and a third connecting rod 44. One end of the first connecting rod 41 is pivotally connected to the base body 11. One end of the second connecting rod 42 is pivotally connected to the other end of the first connecting rod 41. One end of the movable wall 43 is pivotally connected to the other end of the second connecting rod 42. The other end of the movable wall 43 abuts against the back surface of the mold 20. One end of the third connecting rod 44 is pivotally connected to the middle of the second connecting rod 42. The other end of the third connecting rod 44 is pivotally connected to the fixing bracket 30. When the driving mechanism 50 drives the mold 20 to move forward, the first connecting rod 41 closes inward, and the second connecting rod 42 opens outward, such that the first connecting rod 41 and the second connecting rod 42 are parallel to the horizontal plane, and the movable wall 43 moves forward. When the driving mechanism 50 drives the mold 20 to move backward, the first connecting rod 41 opens outward, and the second connecting rod 42 closes inward, and the movable wall 43 moves backward. In this embodiment, the other end of the toggle mechanism 40 abuts against the middle position of the back surface of the mold 20, such that the mold 20 is more evenly stressed and not easily deformed. Specifically, the other end of the toggle mechanism 40 abuts against the abutting portion 21, that is, the other end of the movable wall 43 abuts against the abutting portion of the mold 20.

[0034] The driving mechanism 50 is arranged on the fixing bracket 30. The driving end 51 of the driving mechanism 50 is connected to the mold 20 and drives the mold 20 to perform forward and backward reciprocating movements, thereby driving the toggle mechanism 40 to open or close. In this embodiment, there are two driving mechanisms 50, and the two driving mechanisms 50 are respectively arranged on the left and right sides of the fixing bracket 30. The driving mechanism 50 is an oil cylinder.

[0035] Furthermore, it further includes an adjustment mechanism 60. The adjustment mechanism 60 includes four first gears 61 and one second gear 62. The four first gears 61 are respectively screwed to the rear ends of the four guide posts 12. The four first gears 61 each have a plurality of first tooth portions 611. The second gear 62 is arranged on the base body 11. The second gear 62 has a plurality of second tooth portions 621. The second tooth portions 621 are adapted to the first tooth portions 611. The second gear 62 meshes with the four first gears 61. The second gear 62 meshes with the four first gears 61 simultaneously, and by using the four first gears 61 to be respectively screwed to the rear ends of the four guide posts 12, the distances that the four guide posts 12 extend forward out of the base body 11 are adjusted simultaneously, which is more consistent.

[0036] The design focus of the present utility model lies in: by arranging a fixing frame between the mold and the base body, and then cooperating with arranging the driving mechanism on the fixing frame, the driving end of the driving mechanism is connected to the mold and drives the mold to move back and forth. Compared with the traditional injection molding machine, the driving mechanism is arranged on the fixing frame instead of the rear end of the machine body, effectively shortening the length of the injection molding machine; and, the folding surface of the toggle mechanism faces outward. When extending the mold opening stroke, there is no need to consider whether there is enough space in the toggle space for temporarily storing the connecting rod, making the overall injection molding machine more compact.

[0037] The above is only a preferred embodiment of the present utility model, and does not impose any limitation on the technical scope of the present utility model. Therefore, any minor modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A clamping unit for an injection molding machine, characterized in that: It includes a machine base, a mold, a fixing frame, an elbow mechanism and a driving mechanism; the machine base includes a base body and four guide pillars arranged on the base body, the four guide pillars are respectively arranged at the corners of the base body, and the four guide pillars form an elbow space; the mold can be passed through the four guide pillars for reciprocating movement; the fixing frame is passed through the four guide pillars and is located between the mold and the base body; the elbow mechanism is arranged in the elbow space, one end of the elbow mechanism is axially connected to the base body, and the other end of the elbow mechanism is in contact with the back of the mold; the driving mechanism is arranged on the fixing frame, the driving end of the driving mechanism is connected to the mold and drives the mold to reciprocate back and forth, thereby driving the elbow mechanism to open or close.

2. The mold clamping unit for an injection molding machine according to claim 1, characterized in that: The other end of the toggle mechanism abuts against the middle position of the back side of the mold.

3. The mold clamping unit for an injection molding machine according to claim 2, characterized in that: A resisting portion extends backward from the middle of the back side of the mold, and the other end of the toggle mechanism resists the resisting portion.

4. The mold clamping unit for an injection molding machine according to claim 1, characterized in that: There are two driving mechanisms, which are respectively arranged on the left and right sides of the fixing frame.

5. The mold clamping unit for an injection molding machine according to claim 1, characterized in that: The driving mechanism is a cylinder.

6. The mold clamping unit for an injection molding machine according to claim 1, characterized in that: It further includes an adjustment mechanism, which includes four first gears and a second gear. The four first gears are respectively screwed with the rear ends of the four guide pillars. The four first gears each have a plurality of first tooth portions. The second gear is arranged on the seat body. The second gear has a plurality of second tooth portions. The second tooth portions are adapted to the first tooth portions, and the second gear is meshed with the four first gears.

7. The mold clamping unit for an injection molding machine according to claim 1, characterized in that: The toggle mechanism includes a first connecting rod, a second connecting rod, a movable wall and a third connecting rod; one end of the first connecting rod is axially connected to the seat body, one end of the second connecting rod is axially connected to the other end of the first connecting rod, one end of the movable wall is axially connected to the other end of the second connecting rod, the other end of the movable wall abuts against the back of the mold, one end of the third connecting rod is axially connected to the middle part of the second connecting rod, and the other end of the third connecting rod is axially connected to the fixed frame; When the driving mechanism drives the mold to move forward, the first connecting rod closes inward and the second connecting rod opens outward, so that the first connecting rod and the second connecting rod are parallel to the horizontal plane, and the movable wall moves forward; when the driving mechanism drives the mold to move backward, the first connecting rod opens outward, the second connecting rod closes inward, and the movable wall moves backward.

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