Small table top injection molding machine

Abstract

The utility model discloses a small table top injection molding machine which comprises an injection molding device for injection molding, the injection molding device comprises a mold closing assembly and an injection molding assembly; the die assembly and the connecting rod assembly form a transmission connection structure through a die assembly driving mechanism; the connecting rod assembly is used for horizontally pushing the mold to do telescopic motion in the horizontal axial direction, stretching motion drives the mold to be closed and positioned, or retracting motion drives the mold to be opened and folded and stored. And the injection molding assembly is used for mold feeding injection molding. According to the small desktop injection molding machine, the mold closing and opening actions and the storage space are optimized. The number of the motor driving structures is reduced, and the bottom vacant space of the die assembly is reasonably utilized. Servo driving equipment is reduced, and the injection molding step is simplified. Through optimization of a driving structure, the extension space of equipment in a horizontal space range is reduced, and a transmission belt is used for further transmission optimization and contact interference prevention.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding machine technical field especially relates to a small desktop injection molding machine. BACKGROUND

[0002] Household small injection molding machine is a kind of and in the family environment is used, for thermoplastic or thermosetting plastic processing into various plastic products forming equipment.

[0003] Chinese patent discloses a kind of mini desktop injection molding machine (authorized announcement number CN 212684526U), the patent technology includes a kind of mini desktop injection molding machine, including rack, mold closing mechanism, injection mechanism, mold closing drive mechanism and injection drive mechanism, the mold closing mechanism, setting on the rack, for realizing the opening and closing of mold installed on rack;The injection mechanism, setting on the rack, for injecting melt into the cavity of the mold;The mold closing drive mechanism is connected with mold closing mechanism, for controlling the axial reciprocating motion of mold opening and closing;The injection drive mechanism is connected with injection mechanism, for controlling the rotation of feed screw on injection mechanism and axial reciprocating motion.

[0004] But, the mold closing mechanism, mold closing drive mechanism and injection drive mechanism mentioned in the comparative document, in installation structure, adopt linear shaft body as driving push structure.In push process, need to cooperate mold closing mechanism and corresponding drive mechanism to complete the limiting clamping procedure of injection mold.And in this process, the servo motor and connecting rod structure required for driving are more in the overall framework structure, and because of its structural nature, it is impossible to achieve folding or hiding to complete the size reduction effect of overall framework in later period.The control system required by the device structure of multiple drives will also increase accordingly, and the optimization of overall program also brings inconvenience.In mold closing process, since relying on the driving structure of servo motor, in the process of mold closing limiting contact, the load brought by driving structure will also increase, and long-term will reduce the precision of servo drive.

[0005] Therefore, the person skilled in the art provides small desktop injection molding machine, which is adopted to solve the problems in the above background. UTILITY MODEL CONTENT

[0006] The utility model wants to solve the technical problem: in order to solve the technical problem of too many internal equipment in the prior art and needing to increase the equipment volume, too many internal servo drive equipment and leading to complex control program editing and too many internal equipment interferences, the utility model provides a small desktop injection molding machine. The folding storage and extension support connecting rod assembly structure are adopted in the application, the installation space of the mold closing mechanism is saved, the equipment volume of the injection molding machine is further reduced, the number and assembly position of the internal servo drive equipment are optimized, the mutual interference between the equipment is avoided, and the servo drive equipment is reduced and the transmission structure is optimized.

[0007] The utility model solves the technical scheme that the technical problem adopts: a small desktop injection molding machine, including for injection molding injection molding device,

[0008] The injection molding device includes a mold closing assembly and an injection molding assembly.

[0009] The mold closing assembly is connected with the connecting rod assembly through the mold closing drive mechanism to form a transmission connection structure.

[0010] The connecting rod assembly is used for horizontal push to make the mold do the extension and retraction movement along the horizontal axis, and the extension action drives the mold to close and position or the retraction action drives the mold to open and fold storage.

[0011] The injection molding assembly is used for mold feeding injection molding.

[0012] Further, the mold closing assembly includes a first coupling, a screw rod and a mold closing motor.

[0013] The first coupling center bearing seat is connected with the screw rod side end.

[0014] The screw rod other side end forms a spiral transmission structure with the first rotary disc, and the first rotary disc outer ring forms a transmission structure with the driving end of the mold closing motor through the first transmission belt. Wherein, the first coupling is used as the installation structure of guiding and synchronous movement, which can play the role of driving balance. The driving balance relies on the guide rod structure on both sides of the first coupling to guide and assist, so that the first coupling moves linearly along the extension direction of the guide rod, ensuring the stable operation of the mold closing plate.

[0015] Further, the connecting rod assembly includes a fixed arm, a first connecting rod, a second connecting rod, a third connecting rod, a rotating pin and a mold closing plate.

[0016] The fixed arm extension end is movably connected with the first connecting rod side through the rotating pin.

[0017] The other side of the first connecting rod is movably connected with the second connecting rod side through the rotating pin.

[0018] The first connecting rod middle segment position forms a transmission connection structure with the third connecting rod through the rotating pin.

[0019] The fixed arm and the third connecting rod are connected with the first shaft through a rotating pin.

[0020] The first connecting rod and the second connecting rod in the connecting rod assembly are combined into an extended pushing or folding storage structure, thereby saving installation space.

[0021] Further, in the mold opening state, the second connecting rod forms a folding mold opening connection structure with the first connecting rod and the third connecting rod.

[0022] In the mold closing state, the second connecting rod forms a horizontal unfolding mold closing connection structure with the first connecting rod and the third connecting rod. This structure can reduce the space ratio of the structure inside the machine body in the mold closing state. In the mold opening state, the horizontal connection structure between the connecting rods can be used for auxiliary support process, thereby reducing the load of the servo motor.

[0023] Further, the second connecting rod has a protruding structure extending from the middle section, and the protruding structure has an end head connected with the first shaft through a rotating pin.

[0024] Two groups of guide rods are inserted into the guide holes on both sides of the first shaft. The protruding structure of the second connecting rod serves as a rotating pin installation structure of the connecting rod body, so that the second connecting rod is adapted to the first shaft to complete the connecting rod folding driving process.

[0025] Further, the injection molding device comprises a hopper, a storage pipeline, and an injection port.

[0026] The hopper is connected to the storage pipeline through a pipeline, and the storage pipeline has an external plasticizing unit.

[0027] An extrusion screw is installed in the storage pipeline, the extrusion screw is synchronously connected with a second rotating disc, and the second rotating disc is synchronously driven by a screw drive motor through a second transmission belt.

[0028] The storage pipeline is provided with an injection port on one side. The plasticizing unit serves as an external heating device to provide heat energy for the hot melt injection material inside the storage pipeline. The extrusion screw in the storage pipeline needs to be synchronized with the second rotating disc to complete the synchronous driving process. After the material is replenished, the injection material is output to the injection mold in the mold closing state along the injection port according to the product injection requirement.

[0029] Further, the injection molding device comprises a pushing rod, a lead screw, and an extrusion motor.

[0030] The pushing rod and the extrusion screw form an integrated connection structure, the pushing rod is connected with a second shaft bearing at the other side, and the second shaft is meshed with two groups of lead screws to form a meshing transmission structure.

[0031] Two groups of lead screws are engaged with two groups of third rotating disc center screw holes, and the outer ring of the third rotating disc is connected with the driving end of the extrusion motor through a third transmission belt to form a driving connection structure.

[0032] Further, the third transmission belt is in contact with a tensioning wheel and an anti-interference shaft sleeve in a guiding manner.

[0033] Further, a blanking slope frame is installed on the bottom of the injection cavity of the clamping plate.

[0034] Further, the injection device is provided with three groups of frame plates, and a supporting link is installed between the three groups of frame plates.

[0035] Compared with the prior art, the injection device has the following advantages:

[0036] 1. The folding storage and combined extension support installation structure on the connecting rod assembly is suitable for a plurality of connecting rod structures and the turning cooperation of the turning pin.

[0037] 2. The number of motor driving structures is reduced.

[0038] 3、The utility model discloses the optimization on drive structure, and the drive quantity is too much, and then need staff to calculate the interval between equipment and equipment, avoid the existence mobile interference or installation interference in the operation process. And the application adopts the guiding connection of transmission belt and the transmission turntable structure of simple adaptive structure, reduces the extension space of equipment in horizontal space range, and further transmission optimization and contact interference prevention are carried out using convenient transmission belt. BRIEF DESCRIPTION OF DRAWINGS

[0039] The utility model is further illustrated below in connection with the drawings and examples.

[0040] Fig. 1 It is the structure diagram of small -size desktop injection molding machine of the utility model;

[0041] Fig. 2 It is the structure diagram of connecting rod assembly of small -size desktop injection molding machine of the utility model;

[0042] Fig. 3 It is the structure diagram of pushing mechanism of small -size desktop injection molding machine of the utility model;

[0043] Fig. 4 It is the appearance drawing of small -size desktop injection molding machine of the utility model.

[0044] In the drawing:

[0045] 1, hopper;2, screw drive motor;3, storage pipeline;4, shelf plate;5, mold clamping plate;6, connecting rod assembly;7, first turntable;8, mold clamping motor;9, blanking slope frame;10, extrusion motor;11, third turntable;12, lead screw;13, second coupling;14, second turntable;15, pushing rod;16, first coupling;17, operation door plate;18, machine cover;

[0046] 3-1, plasticizing unit;3-2, injection port;6-1, first connecting rod;6-2, second connecting rod;6-3, third connecting rod;6-4, fixed arm;7-1, first transmission belt;11-1, third transmission belt;14-1, second transmission belt. DETAILED DESCRIPTION

[0047] The utility model will be further explained in connection with the drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the utility model in a schematic manner, therefore it only shows the relevant structure of the utility model.

[0048] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model. In addition, the features limited by "first" and "second" can be explicitly or implicitly included one or more features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0049] In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0050] The utility model is composed of two groups of mechanisms, which are respectively mold closing mechanism and injection molding mechanism.

[0051] The mold closing mechanism utilizes the mold closing motor 8 to drive the first turntable 7 to rotate through the transmission belt, and the first turntable 7 further transmits kinetic energy to the screw, and the first coupling 16 connected with the screw synchronously drives the connecting rod assembly 6 to perform extension supporting action or storage folding action, and the extension supporting action and the storage folding action are matched with the injection molding machine to complete the mold closing task and the mold opening task respectively.

[0052] The injection molding mechanism utilizes the rotary drive motor 2 and the extrusion motor 10 to complete the two groups of tasks of pushing material injection molding and supplementing material pre-injection molding.

[0053] After the material injection molding, the empty material cavity will be reserved along the retracting extrusion screw track in the material storage pipeline 3, and the empty material cavity needs to be supplemented in time, therefore the rotary drive motor 2 transmits power to the second turntable 14 through the second transmission belt 14-1, the second turntable 14 drives the centrally installed pushing rod 15 and the extrusion screw to perform synchronous rotary action, and the extrusion screw fills the injection molding granules accumulated in the hopper 1 into the empty material cavity by utilizing the helical structure of the extrusion screw. And cooperate with the continuously heated plasticizing unit 3-1 to further perform hot melting treatment.

[0054] The extrusion motor 10 transmits power to the two third rotary discs 11 through the third transmission belt 11-1, the third rotary disc 11 drives the middle screw rod 12 to cooperate with the second coupling 13 to achieve the pushing process of the front and back translation movement.

[0055] The working principle of the utility model is: starting the mold closing switch, the user clamps the prepared injection mold between the frame plate 4 and the mold closing plate 5. Start the injection switch, the injection push rod 15 will push the injection material along the storage pipeline 3 outward, and the pushed injection material will enter the injection mold along the injection port 3-2, the injection material in the hot melt state will fill the cavity inside the injection mold, and wait for cooling. After cooling, start the mold opening switch, the mold closing plate 5 resets under the cooperation of the connecting rod assembly 6, and at the same time the injection mold will fall along the blanking slope frame 9, which is convenient for the user to pick up and use.

[0056] The injection molding device comprises a mold closing mechanism and an injection mechanism.

[0057] The mold closing mechanism comprises a mold closing drive assembly and a connecting rod assembly 6, and the mold closing drive assembly is in transmission connection with the connecting rod assembly 6; the connecting rod assembly 6 is used for pushing the mold horizontally to make extension and retraction movements along the horizontal axis, and the extension movement drives the mold to be positioned in the closed state or the retraction movement drives the mold to be opened and folded; the injection assembly is used for feeding and injection molding of the mold.

[0058] As shown in Figs. 1 to 4 , it is the optimal embodiment of the utility model, and the embodiment is a small desktop injection molding machine.

[0059] Embodiment 1

[0060] The user places the prepared injection mold at the mold mounting rod position of the front section of the mold closing plate 5, starts the central control panel, and the connecting rod assembly 6 makes the mold closing action according to the program, and in the final state of the mold closing, the injection port 3-2 faces the input port of the injection mold. Finally, the injection process is completed.

[0061] The three groups of connecting rods in the connecting rod assembly 6 are driven by the first coupling 16 to complete the mold closing extension action and the mold opening folding storage action.

[0062] In the folding storage process, the mold closing plate 5 extrudes the injection mold, and the connecting rod structure will maintain a specific extension action according to the extension distance. The action serves as a support structure during the extension process, which can reduce the load of the driving structure in the support state.

[0063] Embodiment 2

[0064] The hopper 1 provides a good feeding environment, concentrates the provided injection molding pellets in the storage pipeline 3, and cooperates with the plasticizing unit 3-1 to melt. After the melting is completed, the extrusion screw is used to shoot the melted injection molding pellets along the injection port 3-2, and the shot injection molding pellets will enter the specific injection molding mold to complete the shaping.

[0065] Embodiment 3:

[0066] During the pushing process, the pushing rod 15 responsible for the pushing drive is integrally connected with the extrusion screw, the horizontally pushing pushing rod 15 communicates with the extrusion screw to advance together, and the extruded injection molding pellets are shot along the injection port 3-2.

[0067] When the injection molding process is completed, the pushing rod 15 will perform a rotating retreat action, and during the rotating retreat process, the extrusion screw will supplement the newly melted injection molding pellets into the storage pipeline 3 for subsequent use.

[0068] Embodiment 4:

[0069] The design of the tensioning wheel and the anti-interference shaft sleeve is to avoid the third transmission belt 14-1 driven by the double screws from being loosened due to its application, so that the design of the tensioning wheel can improve the transmission effect of the third transmission belt 14-1 through the tensioning effect. The guide structure of the anti-interference shaft sleeve can avoid the direct contact between the third transmission belt 14-1 and the support connecting rod, thereby affecting the overall balance of the machine body.

[0070] Embodiment 5: The material falling slope 9 can cooperate with the injection molding mold after cooling to roll down, which is convenient for users to pick up.

[0071] The injection molding device is installed with three sets of shelf plates 4, and the three sets of shelf plates 4 are installed with support connecting rods.

[0072] Embodiment 6:

[0073] The shelf plate 4 cooperates with the support connecting rod to complete the machine body balance support and the basic loading framework, and the design of the magnetic door facilitates the opening and closing and disassembly of the user.

[0074] Embodiment 7:

[0075] The operation door plate 17 is installed on the machine cover 18 at the material taking position, and the magnetic butt joint installation structure of the operation door plate 17 is more convenient to operate than the hinge structure in the prior art, and can be directly disassembled when needed, providing more operation space.

[0076] In summary:

[0077] The utility model discloses a small desktop injection molding machine optimizes the action of closing and opening mould and storage space. The number of motor drive structure has reduced, and the space of bottom vacancy of closing mould assembly is reasonably utilized. The reduction of servo drive equipment, injection molding step simplification, optimization control procedure. The optimization on drive structure reduces the extension space of equipment in horizontal space range, utilizes transmission belt seat to further drive optimization and prevents contact interference.

[0078] The above-mentioned ideal embodiments according to the utility model are for inspiration, and through the above-mentioned description, relevant staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and must be determined by the scope of claims.

Claims

1. A small benchtop injection molding machine characterized by, The injection molding device comprises an injection molding device for injection molding; The injection molding device comprises a mold clamping mechanism and an injection molding mechanism; The mold clamping mechanism comprises a mold clamping drive assembly and a connecting rod assembly (6), and the mold clamping drive assembly is in transmission connection with the connecting rod assembly (6); The connecting rod assembly (6) is used for horizontally pushing the mold to make telescopic movement along the horizontal axis, and the extension action drives the mold to be clamped and positioned or the retraction action drives the mold to be opened and folded and stored; The injection molding mechanism is used for mold feeding and injection molding; The connecting rod assembly (6) comprises a fixed arm (6-4), a first connecting rod (6-1), a second connecting rod (6-2), a third connecting rod (6-3), a rotating pin and a mold clamping plate (5); The extended end of the fixed arm (6-4) is movably connected to one side of the first connecting rod (6-1) through the rotating pin; The other side of the first connecting rod (6-1) is movably connected to one side of the second connecting rod (6-2) through the rotating pin; The middle section of the first connecting rod (6-1) is in transmission connection with the third connecting rod (6-3) through the rotating pin; The fixed arm (6-4) and the third connecting rod (6-3) are connected to the first coupling (16) through the rotating pin.

2. The small desktop injection molding machine according to claim 1, wherein The mold clamping mechanism comprises a first coupling (16) connected with the connecting rod assembly, a screw rod and a mold clamping motor (8); The driving end of the mold clamping motor (8) is in transmission connection with a first rotating disc (7) through a first transmission belt (7-1), one side of the first rotating disc (7) is in transmission connection with the screw rod, and the other side of the screw rod is in butt joint with the first coupling (16).

3. The small desktop injection molding machine according to claim 1, wherein In the mold opening state, the second connecting rod (6-2) forms a folding mold opening connection structure with the first connecting rod (6-1) and the third connecting rod (6-3), In the mold clamping state, the second connecting rod (6-2) forms an unfolding mold clamping connection structure with the first connecting rod (6-1) and the third connecting rod (6-3).

4. A small benchtop injection molding machine as claimed in claim 3, wherein, The middle section of the second connecting rod (6-2) extends a protruding structure, and the extended end of the protruding structure is connected to the first coupling (16) through the rotating pin; Two groups of guide rods are inserted into the guide holes on both sides of the first coupling (16).

5. The small benchtop injection molding machine of claim 1, wherein, The injection molding mechanism comprises a hopper (1), a storage pipeline (3) and an injection port (3-2); The hopper (1) is in feeding butt joint with the storage pipeline (3) through a pipeline, and the outer wall of the storage pipeline (3) is provided with a plasticizing unit (3-1) connected thereto; An extrusion screw rod is installed in the storage pipeline (3), the extrusion screw rod is in synchronous connection with a second rotating disc (14), the second rotating disc (14) forms a synchronous driving structure with a screw driving motor (2) through a second transmission belt (14-1); An injection port (3-2) is installed on one side of the storage pipeline (3).

6. The small benchtop injection molding machine of claim 1, wherein, The injection molding device comprises a pushing rod (15), a lead screw (12) and an extrusion motor (10); The pushing rod (15) forms an integrated connection structure with the extrusion screw rod, the other side of the pushing rod (15) is connected with a second coupling center bearing, and the two sides of the second coupling are in meshing transmission structure with two groups of lead screws (12); Two groups of lead screws (12) are engaged with the center screw holes of two groups of third turntables (11), and the outer rings of the third turntables (11) are connected with the driving end of the extruding motor (10) through third transmission belts (11-1).

7. A small benchtop injection molding machine as claimed in claim 6, characterized in that The third transmission belts (11-1) are in contact with the tension pulleys and the anti-interference shaft sleeve respectively.

8. The small benchtop injection molding machine of claim 1, wherein, The injection molding device is provided with a blanking slope frame (9) at the bottom of the injection molding cavity of the first frame plate (4) and the mold clamping plate (5).

9. The small benchtop injection molding machine of claim 1, wherein, The injection molding device is vertically provided with three groups of frame plates (4), and support connecting rods are arranged between the three groups of frame plates (4). The machine cover (18) of the injection molding device is magnetically connected with the operation door plate (17).

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