CN221913069U - A plastic worm injection mold capable of being flexibly adjusted - Google Patents

Abstract

The utility model relates to the field of plastic worm injection molds, and discloses a plastic worm injection mold capable of being flexibly adjusted, which comprises a lower mold frame, an upper mold frame, a rectangular limit groove and a mold group, wherein the upper mold frame is sleeved on the lower mold frame in a sliding manner; the die set comprises a positioning frame which is slidably arranged in the lower die frame and the upper die frame, a plurality of injection die shells are embedded in the positioning frame, and the positioning frame is provided with an elastic limiting component; an ejection mechanism for pushing the injection mold shell to longitudinally move and be embedded into the rectangular limiting groove is arranged in the lower mold frame and the upper mold frame; the lower die frame and the upper die frame are provided with moving mechanisms which are used for controlling the movement of the die set and enabling different injection die shells to vertically correspond to the rectangular limiting grooves; the injection mold can be used for adjusting the corresponding injection mold shells to be combined and processed according to the size and the model of the production plastic worm, and is flexible and convenient to operate.

Description

A plastic worm injection mold capable of being flexibly adjusted

Technical Field

The utility model relates to the field of plastic worm injection molds, in particular to a plastic worm injection mold which can be flexibly adjusted.

Background Art

The injection molding of plastic worm gears is a process in which thermoplastic or thermosetting plastics are injected into a mold under high pressure, and then cooled and solidified to form a part of a specific shape. In order to facilitate the removal of parts, the general plastic worm gear injection mold is a combined mold, which is formed by the combination of upper and lower molds. After processing, the upper and lower molds are separated, and finally the worm gear is demolded and removed from the mold.

Chinese patent CN208826974U discloses a worm shaft processing mold, including a lower mold base and an upper mold base, the inner end surfaces of the lower mold base and the upper mold base are fixedly connected with a lower module and an upper module, the upper surface of the lower module is pressed and contacted with the inner side surface of the upper module, the inner side surfaces of the upper module and the lower module are provided with a mold groove, the inner side surfaces of the lower module and the upper module are provided with a guide channel, the inner side surfaces of the upper mold base and the upper module are provided with an injection hole, the inner side surfaces of the lower module and the upper module are provided with a first cooling groove and a second cooling groove, the front and rear end upper surfaces of the lower mold base are fixedly connected with a first support plate, the front and rear end lower surfaces of the upper mold base are fixedly connected with a second support plate, the inner side surface of the first support plate is slidably connected with a bayonet and a first spring through a slide groove, and the worm shaft processing mold is convenient for mold closing and demoulding, and convenient for cooling.

There are many sizes of worms, and one model of worm corresponds to an injection mold. The wide variety of injection molds for industrial worm production is inconvenient to manage. In addition, when producing different plastic worms, the injection mold needs to be removed from the processing equipment and a mold of the appropriate model needs to be installed. The operation is cumbersome and the adaptability of the mold application is low. In addition, the dust particles in the cavity of the injection mold during storage affect the quality of the subsequent preparation of the plastic worm. Some existing injection molds do not have a cleaning effect and require additional manual or mechanical cleaning when used, and the application functionality is limited.

Utility Model Content

In view of the above problems, a flexibly adjustable plastic worm injection mold is provided. Different injection mold shells in the mold group can be switched and engaged in the lower mold frame and the upper mold frame through a moving mechanism and an ejection mechanism, which solves the problems of a large variety of worm sizes, one injection mold corresponding to one model of worm, a large variety of injection molds for industrial preparation of worms that are inconvenient to manage, and the need to remove the injection mold from the processing equipment and install a mold that meets the model when producing different plastic worms, cumbersome operation, and low adaptability of mold application.

In order to solve the problems of the prior art, the utility model provides a plastic worm injection mold which can be flexibly adjusted, comprising a lower mold frame and an upper mold frame slidably mounted on the lower mold frame, the plastic worm injection mold also comprising rectangular limiting grooves provided on the lower mold frame and the upper mold frame, and a mold group slidably mounted in the lower mold frame and the upper mold frame; the mold group comprises a positioning frame slidably mounted in the lower mold frame and the upper mold frame, a plurality of injection mold shells are embedded and mounted in the positioning frame, and an elastic limiting component for limiting the upward and downward movement of the injection mold shell is arranged in the positioning frame; an ejection mechanism for pushing the injection mold shell to move longitudinally and embed into the rectangular limiting groove is arranged in the lower mold frame and the upper mold frame; a moving mechanism is arranged in the lower mold frame and the upper mold frame, and the moving mechanism is used to control the movement of the mold group and make different injection mold shells correspond to the rectangular limiting groove up and down.

Preferably, the moving mechanism includes moving grooves opened in the lower mold frame and the upper mold frame, a moving frame is slidably installed in the moving groove in the lower mold frame, a moving frame is slidably installed in the moving groove in the upper mold frame, and the moving frame and the moving frame are longitudinally penetrated and slidably assembled; a spring pin assembly for limiting the moving position of the moving frame is provided in the lower mold frame.

Preferably, the spring pin assembly includes a slide bar fixed in the lower mold frame, a pin is slidably mounted on the slide bar, a return spring is connected between the pin and the lower mold frame, and a slot for engaging with the pin is opened on the movable frame.

Preferably, the ejection mechanism includes a hydraulic drive rod fixed in the lower mold frame and the upper mold frame, the lifting end of the hydraulic drive rod is fixedly installed with an ejection block, the positioning frame is provided with a circular groove corresponding to the position of the injection mold shell, and the ejection block moves longitudinally through the circular groove.

Preferably, the elastic limiting assembly comprises a guide rod fixed in the positioning frame, a slide seat is slidably mounted on the guide rod, the slide seat is fixedly mounted on the injection mold shell, and a limiting spring is connected between the slide seat and the positioning frame.

Preferably, negative pressure cleaning components for cleaning dust particles in the shell cavity of the injection mold are installed on the lower mold frame and the upper mold frame.

Preferably, the negative pressure cleaning component includes an air duct opened in the lower mold frame and the upper mold frame, the air duct is provided with an air port that communicates with the shell cavity of the injection mold, and the air duct port is equipped with an air inlet head for regulating the air pressure; a sealing piece that fits and moves under the air port is fixedly installed on the positioning frame.

Compared with the prior art, the utility model has the following beneficial effects:

1. The utility model is provided with a moving mechanism and an ejection mechanism to switch different injection mold shells in the mold group for use in combination with the lower mold frame and the upper mold frame. A plurality of injection mold shells are provided in the mold group. The corresponding injection mold shell is selected according to the size of the processed plastic worm gear. The mold group in the upper mold frame and the lower mold frame is controlled to move synchronously by the moving component, so that the corresponding injection mold shell in the mold group moves to correspond to the upper and lower rectangular limit grooves, and then the injection mold shell is pushed by the ejection mechanism to engage in the rectangular limit groove to complete the adjustment of the injection mold shell in the upper mold frame and the lower mold frame, so that plastic worm gears of multiple sizes and models can be processed in one injection mold, and the injection mold has strong adjustability and high adaptability.

2. The utility model is provided with a negative pressure cleaning component for cleaning dust particles in the injection mold shell cavity. The injection mold shell to be used in the mold group is stored in the lower mold frame and the upper mold frame, and the cavity inside the injection mold shell is interconnected with the air port and the air duct in the negative pressure cleaning component. A negative pressure device is used to absorb the gas in the injection mold shell cavity through the negative pressure of the air inlet head, and the dust particles in the injection mold shell cavity are carried out and discharged by the gas, thereby maintaining the cleanliness of the injection mold shell during use, and no subsequent manual cleaning or mechanical cleaning is required.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the three-dimensional structure of a lower mold frame of a plastic worm injection mold that can be flexibly adjusted.

FIG. 2 is a schematic diagram of the three-dimensional structure of an upper mold frame of a plastic worm injection mold that can be flexibly adjusted.

FIG. 3 is a schematic diagram of the three-dimensional structure of an injection mold shell of a plastic worm injection mold that can be flexibly adjusted.

FIG. 4 is a schematic diagram of the three-dimensional structure of a positioning frame of a plastic worm injection mold that can be flexibly adjusted.

FIG. 5 is a schematic diagram of a three-dimensional structure of a circular groove of a plastic worm injection mold that can be flexibly adjusted.

FIG. 6 is a schematic diagram of the three-dimensional structure of a hydraulic drive rod of a plastic worm injection mold that can be flexibly adjusted.

FIG. 7 is a schematic diagram of a three-dimensional structure of a pin of a flexibly adjustable plastic worm injection mold.

FIG8 is a schematic diagram of the three-dimensional structure of an elastic limiting component of a plastic worm injection mold that can be flexibly adjusted.

FIG. 9 is a schematic diagram of the three-dimensional structure of a limit spring of a plastic worm injection mold that can be flexibly adjusted.

FIG. 10 is a schematic diagram of the airway cross-sectional structure of a flexibly adjustable plastic worm injection mold.

FIG. 11 is a schematic diagram of the cross-sectional structure of a lower mold frame of a flexibly adjustable plastic worm injection mold.

The numbers in the figure are:

1. Lower mold frame; 11. Upper mold frame; 2. Rectangular limit groove; 3. Mold group; 31. Positioning frame; 32. Injection mold shell; 33. Elastic limit assembly; 331. Guide rod; 332. Slide seat; 333. Limit spring; 4. Ejection mechanism; 41. Hydraulic drive rod; 42. Ejection block; 43. Round groove; 5. Moving mechanism; 51. Moving groove; 52. Moving frame; 53. Moving frame; 54. Spring pin assembly; 541. Slide rod; 542. Pin; 543. Reset spring; 544. Slot; 6. Negative pressure cleaning assembly; 61. Airway; 62. Air port; 63. Air inlet head; 64. Sealing piece.

DETAILED DESCRIPTION

In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

Referring to FIGS. 1 to 6 , a flexibly adjustable plastic worm injection mold comprises a lower mold frame 1 and an upper mold frame 11 slidably mounted on the lower mold frame 1. The plastic worm injection mold further comprises a rectangular limiting groove 2 provided on the lower mold frame 1 and the upper mold frame 11, and a mold group 3 slidably mounted in the lower mold frame 1 and the upper mold frame 11; the mold group 3 comprises a positioning frame 31 slidably mounted in the lower mold frame 1 and the upper mold frame 11, a plurality of injection mold shells 32 are slidably mounted in the positioning frame 31, and an elastic limiting component for limiting the upward and downward movement of the injection mold shell 32 is provided in the positioning frame 31 33; the lower mold frame 1 and the upper mold frame 11 are provided with an ejection mechanism 4 for pushing the injection mold shell 32 to move longitudinally and engage in the rectangular limiting groove 2; the lower mold frame 1 and the upper mold frame 11 are provided with a moving mechanism 5, the moving mechanism 5 is used to control the movement of the mold group 3 and make different injection mold shells 32 correspond to the rectangular limiting groove 2 up and down; the position of the injection mold shell 32 engaged in the rectangular limiting groove 2 in the upper mold frame 11 is distributed in a vertically corresponding manner to the position of the injection mold shell 32 engaged in the rectangular limiting groove 2 in the lower mold frame 1, and the injection mold shells 32 are arranged in equal intervals in the positioning frame 31.

According to the size and model of the plastic worm gear to be processed as needed, the injection mold shell 32 of the corresponding model is controlled to be assembled in the lower mold frame 1 and the upper mold frame 11, and the mold group 3 in the upper mold frame 11 and the lower mold frame 1 is controlled to move synchronously through the moving mechanism 5. The mold group 3 drives the injection mold shell 32 assembled inside to move in a directional manner, so that the corresponding injection mold shell 32 moves to the position corresponding to the rectangular limit groove 2, and the injection mold shell 32 is pushed by the ejection mechanism 4 to move and engage in the rectangular limit groove 2, completing the combined assembly of the injection mold shell 32 with the upper mold frame 11 and the lower mold frame 1.

During processing, the upper mold frame 11 is controlled to move downward and assembled with the lower mold frame 1. At this time, the injection mold shell 32 in the rectangular limiting groove 2 in the upper mold frame 11 and the lower mold frame 1 forms a sealed cavity structure, and the injection liquid is controlled to enter the cavity in the injection mold shell 32 to complete the injection molding of the plastic worm.

As shown in Figures 1 to 5, the moving mechanism 5 includes a moving groove 51 opened in the lower mold frame 1 and the upper mold frame 11, a moving frame 52 is slidably installed in the moving groove 51 in the lower mold frame 1, and a moving frame 53 is slidably installed in the moving groove 51 in the upper mold frame 11, and the moving frame 52 and the moving frame 53 are longitudinally penetrated and slidably assembled; a spring pin assembly 54 for limiting the moving position of the moving frame 52 is provided in the lower mold frame 1; the position of the spring pin assembly 54 corresponds to the position of the injection mold shell 32 distributed at equal intervals.

The movable frame 52 is pushed to move in a directional manner in the movable groove 51, and the movable frame 52 is engaged and assembled with the movable frame 53, so that the movable frame 53 moves synchronously in the movable groove 51 accordingly. At this time, the movable frame 52 and the movable frame 53 drive the mold group 3 to move in a directional manner in the lower mold frame 1 and the upper mold frame 11, and adjust the position of the mold group 3 corresponding to the upper mold frame 11 and the lower mold frame 1, so as to control the different types of injection mold shells 32 to be assembled with the upper mold frame 11 and the lower mold frame 1. When the corresponding type of injection mold shell 32 is controlled to move to correspond to the position of the rectangular limit groove 2, the spring pin assembly 54 is engaged and limited with the movable frame 52, and the position of the injection mold shell 32 to be moved and adjusted is preliminarily limited.

Referring to Figures 3 and 7, the spring pin assembly 54 includes a slide rod 541 fixed in the lower mold frame 1, a pin 542 is slidably mounted on the slide rod 541, a return spring 543 is connected between the pin 542 and the lower mold frame 1, and a slot 544 for engaging with the pin 542 is provided on the movable frame 52; the end face of the pin 542 is a hemispherical structure.

When the movable frame 52 moves and contacts the hemispherical surface at the outer end of the pin 542, the pin 542 is pushed to move toward the lower mold frame 1. When the slot 544 on the movable frame 52 moves to correspond to the position of the pin 542, the pin 542 moves outward under the elastic thrust of the return spring 543. The pin 542 is engaged in the slot 544 opened on the movable frame 52. The position of the movable frame 52 at this time can be quickly limited by the engaging structure, thereby accurately positioning the upper and lower corresponding positions of the injection mold shell 32 and the rectangular limit groove 2.

5, 6 and 11, the ejection mechanism 4 includes a hydraulic drive rod 41 fixed in the lower mold frame 1 and the upper mold frame 11, and an ejection block 42 is fixedly installed at the lifting end of the hydraulic drive rod 41. A circular groove 43 corresponding to the position of the injection mold shell 32 is opened on the positioning frame 31, and the ejection block 42 moves longitudinally through the circular groove 43.

After adjusting the position of the injection mold shell 32 and the rectangular limiting groove 2, the hydraulic drive rod 41 is operated to push the ejector block 42 to move longitudinally. The ejector block 42 moves and penetrates the circular groove 43 on the positioning frame 31, and the ejector block 42 contacts the injection mold shell 32, pushing the injection mold shell 32 to move and engage into the rectangular limiting groove 2, and the assembly between the injection mold shell 32 and the upper mold frame 11 and the lower mold frame 1 is completed through the engaging structure.

As shown in Figures 6 to 9, the elastic limiting assembly 33 includes a guide rod 331 fixed in the positioning frame 31, a slide seat 332 is slidably mounted on the guide rod 331, the slide seat 332 is fixedly mounted on the injection mold shell 32, and a limiting spring 333 is connected between the slide seat 332 and the positioning frame 31.

The injection mold shell 32 is thrusted by the ejection block 42 and engages into the rectangular limit groove 2. At this time, the injection mold shell 32 drives the slide seat 332 fixed on the side to move synchronously, and the slide seat 332 squeezes the limit spring 333 to the side. When the ejection block 42 moves in the opposite direction and separates from the injection mold shell 32, the injection mold shell 32 moves and resets under the elastic tension of the limit spring 333, keeping the injection mold shell 32 engaged in the positioning frame 31 when not subjected to thrust.

1 to 4 , 10 and 11 , a negative pressure cleaning assembly 6 for cleaning dust particles in the cavity of the injection mold shell 32 is installed on the lower mold frame 1 and the upper mold frame 11 .

The injection mold shell 32 in the positioning frame 31 is engaged in the rectangular limiting groove 2 and is received in the lower mold frame 1 and the upper mold frame 11. The cavity inside this part of the injection mold shell 32 can be cleaned by the negative pressure cleaning component 6 to maintain the cleanliness of the internal cavity of the injection mold shell 32.

Referring to Figures 1 to 4, 10 and 11, the negative pressure cleaning assembly 6 includes an air duct 61 opened in the lower mold frame 1 and the upper mold frame 11, the air duct 61 is provided with an air port 62 which is connected to the cavity of the injection mold shell 32, and the port of the air duct 61 is installed with an air inlet head 63 for regulating the air pressure; a sealing piece 64 which fits and moves under the air port 62 is fixedly installed on the positioning frame 31.

The air inlet head 63 is connected to the negative pressure device, and the negative pressure device is operated to absorb the gas in the injection mold shell 32 through the air duct 61 and the air port 62. The gas carries the dust particles in the injection mold shell 32 and is discharged outward, thereby maintaining the cleanliness of the cavity inside the injection mold shell 32. Subsequently, the injection mold shell 32 can be used directly when it is moved and used in combination with the lower mold frame 1 and the upper mold frame 11, without the need for additional cleaning treatment, and is more convenient to use.

The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims (7)

1. The utility model provides a plastic worm injection mold that can nimble adjust, includes down die carrier (1) and slip cap establish last die carrier (11) on lower die carrier (1), its characterized in that: the plastic worm injection mold further comprises rectangular limit grooves (2) formed in the lower mold frame (1) and the upper mold frame (11), and a mold set (3) which is embedded and slidably installed in the lower mold frame (1) and the upper mold frame (11);

The die set (3) comprises a positioning frame (31) which is slidably arranged in the lower die frame (1) and the upper die frame (11), a plurality of injection die shells (32) are embedded in the positioning frame (31), and an elastic limiting assembly (33) which limits the injection die shells (32) to move up and down is arranged in the positioning frame (31);

An ejection mechanism (4) for pushing the injection mold shell (32) to longitudinally move and be embedded into the rectangular limiting groove (2) is arranged in the lower mold frame (1) and the upper mold frame (11);

The lower die frame (1) and the upper die frame (11) are internally provided with a moving mechanism (5), and the moving mechanism (5) is used for controlling the die set (3) to move and enabling different injection die shells (32) to vertically correspond to the rectangular limiting grooves (2).

2. The flexibly adjustable plastic worm injection mold of claim 1, wherein: the moving mechanism (5) comprises a moving groove (51) formed in the lower die frame (1) and the upper die frame (11), a moving frame (52) is slidably arranged in the moving groove (51) in the lower die frame (1), a moving frame (53) is slidably arranged in the moving groove (51) in the upper die frame (11), and the moving frame (52) and the moving frame (53) longitudinally penetrate through and are slidably assembled;

A spring pin assembly (54) for limiting the moving position of the moving frame (52) is arranged in the lower die frame (1).

3. The flexibly adjustable plastic worm injection mold of claim 2, wherein: the spring pin assembly (54) comprises a sliding rod (541) fixed in the lower die carrier (1), a pin (542) is slidably mounted on the sliding rod (541), a return spring (543) is connected between the pin (542) and the lower die carrier (1), and a clamping groove (544) which is assembled by being clamped with the pin (542) is formed in the movable frame (52).

4. The flexibly adjustable plastic worm injection mold of claim 1, wherein: the ejection mechanism (4) comprises a hydraulic driving rod (41) fixed in the lower die frame (1) and the upper die frame (11), an ejection block (42) is fixedly arranged at the lifting end of the hydraulic driving rod (41), a circular groove (43) corresponding to the injection die shell (32) in position is formed in the positioning frame (31), and the ejection block (42) longitudinally moves to penetrate through the circular groove (43).

5. The flexibly adjustable plastic worm injection mold of claim 1, wherein: the elastic limiting assembly (33) comprises a guide rod (331) fixed in the positioning frame (31), a sliding seat (332) is slidably mounted on the guide rod (331), the sliding seat (332) is fixedly mounted on the injection mold shell (32), and a limiting spring (333) is connected between the sliding seat (332) and the positioning frame (31).

6. The flexibly adjustable plastic worm injection mold of claim 1, wherein: and negative pressure cleaning assemblies (6) for cleaning dust particles in the cavity of the injection mold shell (32) are arranged on the lower mold frame (1) and the upper mold frame (11).

7. The flexibly adjustable plastic worm injection mold of claim 6, wherein: the negative pressure cleaning assembly (6) comprises an air passage (61) arranged in the lower die frame (1) and the upper die frame (11), an air port (62) communicated with a cavity of the injection die shell (32) is arranged on the air passage (61), and an air inlet head (63) for regulating air pressure is arranged at the port of the air passage (61);

the positioning frame (31) is fixedly provided with a blocking piece (64) which is attached to the lower part of the air port (62) and moves.