CN110802794A - A continuous injection mold-free three-platen injection molding machine - Google Patents

Abstract

The invention discloses a continuous injection mold-free three-platen injection molding machine, which includes a tail plate, a movable template, a fixed template and an injection molding structure. An injection mold is arranged between the movable template and the fixed template. And the movable mold, the fixed mold and the movable mold are provided with a double-station reversing mold core, and a fixed mold capable of reciprocating motion is penetrated along the direction perpendicular to the axis of the fixed mold. The two reversing die cores, the movable template is also provided with an ejecting oil cylinder for ejecting the product, and the beneficial effects of the present invention are: a dual-station reversing die core is adopted, and the process of ejecting and discharging from one station In the injection molding process, the reversing mold core of another station is used for the injection molding process, which greatly shortens the process time, especially avoids the conventional product moving template to open the mold and lock the mold for ejection, resulting in high energy consumption and repeated mold opening and locking for the equipment. more demanding questions.

Description

A continuous injection mold-free three-platen injection molding machine

Technical field:

The invention belongs to the technical field of injection molding machine equipment, and more particularly relates to a three-platen injection molding machine for continuous injection molding without opening the mold.

Background technique:

Injection molding machine is the main molding equipment for making thermoplastics or thermosetting materials into various shapes of plastic products using plastic molding molds. Its working principle is similar to that of a syringe for injection. The molten state, that is, the plastic in the viscous flow state, is injected into the closed mold cavity, and the process of obtaining the product after curing and shaping. The injection molding machine has the ability to form plastic products with complex appearance, precise size or dense texture with metal inserts at one time. It has been widely used in national defense, electromechanical, automobile, transportation, building materials, packaging, agriculture, culture, education, health and people. All areas of daily life.

The three-platen injection molding machine has three templates, which are in order: fixed plate, movable plate and tail plate. The two halves of the mold are respectively installed on the fixed template and the movable template, and the flexion and extension of the flexing arm mechanism realizes the forward and backward = movement of the movable template, so that the mold can be opened and closed.

That is to say, the preparation of each product requires the flexion and extension of the flexing arm mechanism to complete mold clamping, injection molding and mold opening. mold. The action is complex and the molding cycle is slow.

Invention content:

In order to solve the above problems and overcome the deficiencies of the prior art, the present invention provides a way of changing the mold structure on common equipment to realize the removal of products without opening the mold, which can effectively solve the problems of complex movements, slow molding cycle and low production efficiency.

The specific technical scheme of the present invention to solve the above-mentioned technical problems is: continuous injection mold-free three-platen injection molding machine, including a tail plate, a movable template, a fixed template and an injection molding structure, and an injection mold is arranged between the movable template and the fixed template. The injection mold includes a fixed mold and a movable mold. The fixed mold and the movable mold are provided with a double-station reversing mold core, and a fixed mold capable of reciprocating movement is inserted along the direction perpendicular to the axis of the fixed mold. The reversing die core includes two reversing die cores arranged side by side, and an ejecting oil cylinder for ejecting the product is also arranged on the movable die plate.

Further, the reversing mold core is provided with mutually independent ejection cavities and injection cavities adjacent to each other along the axis direction.

Further, the injection cavity is set in a structure with one end open, a preset number of guide rods are arranged in the injection cavity along the horizontal direction, and a sub-moving mold is arranged in the injection cavity through a sliding connection, and the end of the guide rod is provided. The expansion structure is provided, the end of the guide rod is sleeved with a return spring, the guide rod is penetrated in the sub-moving mold, the outer end of the sub-moving mold is provided with a groove that is engaged with the return spring, and the axis of the sub-moving mold is set There are bosses and gates, the outer end face of the boss is consistent with the side end face of the reversing die core, and the bottom of the injection cavity is provided with a discharge port.

Further, an ejector plate is arranged in the ejector cavity through a sliding connection, and a long ejector rod and a short ejector rod with different lengths are arranged on the inner side of the ejector plate along the horizontal direction, and the long ejector rod passes through the partition plate. In cooperation with the sub movable mold, a product ejection structure is also arranged on the partition between the ejection cavity and the injection cavity.

Further, the product ejection structure includes a positioning column, the outer side of the positioning column is provided with a top plate, the inner side of the top plate is provided with a spring, the outer side of the top plate is provided with a limit plate, the top plate is provided with a thimble along the axis direction, and the thimble is passed through the partition plate and The product in the injection cavity is matched, and the top plate is matched with the short ejector rod.

Further, the upper end surface of the fixed mold is provided with a positioning oil cylinder, and the front end of the positioning oil cylinder is provided with a conical positioning block for positioning the gate of the sub-movable mold and the center gate of the fixed mold. A reversing motor is also provided, and the reversing motor cooperates with the rack provided on the upper end face of the reversing die core in a meshing manner through an excessive gear.

Further, a product slide plate is also arranged below the discharge port, and a conveyor belt is arranged below the product slide plate.

The beneficial effects of the present invention are: by adopting the double-station reversing die core, during the process of ejecting and discharging material from one station, the reversing die core of the other station performs the injection molding process, which greatly shortens the process time, especially avoids the The conventional product moving template is used to open the mold and lock the mold for ejection, which leads to the problems of high energy consumption and repeated mold opening and locking for high equipment requirements.

Description of drawings:

Accompanying drawing 1 is the structural representation of the present invention;

2 is a schematic cross-sectional view of an embodiment of a reversing die core of the present invention;

3 is a schematic cross-sectional view of another embodiment of the reversing die core of the present invention;

4 is a schematic cross-sectional view of another embodiment of the reversing die core of the present invention;

Accompanying drawing 5 is the three-dimensional schematic diagram of the reversing die core of the present invention; Among the accompanying drawings:

1. Fixed mold; 2. Reversing motor; 3. Positioning cylinder; 4. Moving mold; 5. Motor gear; 6. Over gear; 7. Reversing mold core; 8. Rack; 9. Sub-moving mold; 10 , guide rod; 11, conveyor belt; 12, product slide plate; 13, ejection cylinder; 14, ejection cylinder seat; 15, tail plate; 16, movable template; 17, fixed template; 18, injection molding structure; 111, top cavity; 112, injection cavity; 113, boss; 114, gate; 115, groove; 116, expanded structure; 117, return spring; 118, thimble; 119, top plate; 120, limit plate; 121, positioning column; 122, long ejector rod; 123, short ejector rod; 124, ejector plate.

Detailed ways:

The specific details in the description of the present invention are only for the purpose of fully understanding the embodiments of the present invention, but those skilled in the art should know that the implementation of the present invention is not limited to these details. Additionally, well-known structures and functions are not described or shown in detail to avoid obscuring the gist of the embodiments of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The specific embodiment of the present invention: continuous injection mold-free three-platen injection molding machine, including a tail plate 15, a movable template 16, a fixed template 17 and an injection molding structure 18, and an injection mold is arranged between the movable template 16 and the fixed template 17, which is characterized in that The injection mold includes a fixed mold 1 and a movable mold 4. The fixed mold 1 and the movable mold 4 are provided with a double-station reversing mold core, and a reciprocating double-station changing mold is provided along the direction perpendicular to the axis of the fixed mold 1. As for the reversing mold core, the double-station reversing mold core includes two reversing mold cores 7 arranged side by side, and an ejecting oil cylinder 13 for ejecting products is also provided on the movable die plate 16 .

The upper end face of the fixed mold 1 is provided with a positioning cylinder 3, and the front end of the positioning cylinder 3 is provided with a conical positioning block that is concentric with the gate 114 for positioning the sub-movable mold 9 and the central gate 114 of the fixed mold 1. The upper end face of the movable die 4 is also provided with a reversing motor 2 , and the reversing motor 2 is engaged with the rack 8 arranged on the upper end face of the reversing die core 7 through the over gear 6 in the manner of meshing. A product slide 12 is also provided below the discharge port, and a conveyor belt 11 is provided below the product slide 12 .

The reversing mold core 7 is provided with mutually independent ejection cavity 111 and injection cavity 112 adjacent to each other along the axis direction. The injection cavity 112 is set in a structure with one end open. A preset number of guide rods 10 are arranged in the injection cavity 112 along the horizontal direction. The injection cavity 112 is provided with a sub-moving mold 9 through sliding connection. The guide rods 10 The end of the guide rod 10 is provided with an enlarged structure 116, the end of the guide rod 10 is sleeved with a return spring 117, the guide rod 10 is inserted in the sub-movable mold 9, and the outer end of the sub-movable mold 9 is provided with a snap connection with the return spring 117. Groove 115, a boss 113 and a gate 114 are provided on the axis of the sub-movable mold 9, the outer end surface of the boss 113 is consistent with the side end surface of the reversing mold core 7, and the bottom of the injection cavity 112 is provided with a discharge port.

Further, an ejector plate 124 is provided in the ejector cavity 111 by sliding connection, and a long ejector rod 122 and a short ejector rod 123 with different lengths are arranged on the inner side of the ejector plate 124 along the horizontal direction. The rod 122 passes through the partition plate to cooperate with the sub movable mold 9, and the partition plate of the ejection cavity 111 and the injection cavity 112 is also provided with a product ejection structure. The product ejection structure includes a positioning column 121, the outer side of the positioning column 121 is provided with a top plate 119, the inner side of the top plate 119 is provided with a spring, the outer side of the top plate 119 is provided with a limit plate 120, and the top plate 119 is provided with an ejector pin 118 along the axis direction. 118 passes through the partition plate to cooperate with the product in the injection cavity 112, and the top plate 119 and the short ejector rod 123 are gap-fitted.

When using, the specific operations are as follows: continuous injection mold-free three-platen injection molding machine adopts double-station reversing mold core, without mold opening, to realize continuous injection molding and continuous ejection of products, shorten the molding cycle and improve work efficiency.

Further, the device for taking products without opening the mold is alternately operated by a reversing mold core with a double station, and the sub-movable mold is opened and ejected outside the mold.

Further, the reversing action of the double station is performed by the reversing motor 2 through the over gear 6 and the rack 8 arranged on the upper end face of the reversing die core 7 through meshing to perform the reciprocating action. The positioning cylinder 3 with the conical positioning block performs precise positioning to ensure that the gate of the sub movable mold 9 is concentric with the central gate of the main mold.

Further, an ejector cylinder 13 is distributed on both sides of the moving template 16 of the equipment. After the reversing die core 7 is in place, the ejector cylinder 13 pushes the ejector plate 124 to move. The ejector rods on the ejector plate 124 have two lengths, the long top The ejector rod 122 first pushes the sub-moving mold 9 to move, first separates the sub-moving mold from the product, and the top plate 119 and the short ejector rod 123 are gap-fitted. After moving for a certain distance, the short ejector rod 123 is used to eject the product.

Further, the sub-moving die 9 can slide on the guide rod 10, the end of the guide rod 10 is provided with an enlarged structure 116, and the end of the guide rod 10 is sleeved with a return spring 117, after the ejection cylinder is retracted, the sub-movement The mold 9 is automatically reset by the spring, and the ejector pin 118 is reset by the spring; the product falls to the product slide 12 through the discharge port and is transferred by the conveyor belt 11 .

It is worth noting that the use of dual-station reversing mold cores, during the process of ejecting and discharging materials through the above steps, the reversing mold cores of the other station perform the injection molding process, which greatly shortens the process time and avoids conventional products. The movable template 16 opens and locks the mold for ejection, resulting in high energy consumption and repeated mold opening and locking, which requires higher equipment;

Further, a boss 113 and a gate 114 are arranged on the axis of the sub-moving die 9, and the outer end face of the boss 113 is consistent with the side end face of the reversing die core 7, which prevents the sub-moving die 9 from rebounding due to high-pressure injection molding, and increases the The air tightness and stability of injection molding of gate 114.

The bottom of the reversing die core 7 adopts rolling friction with the fixed die 1 and the movable die 4, and there is a nylon damping block after the reversing in place to ensure the smooth operation of the equipment.

In particular, the cooling water installation holes of the two stations of the reversing die core 7 are on the outside, and the two stations are not connected, so as to ensure that the length of the path through which the cooling water passes is the same, and the cooling effect is the same.

Claims (7)

1. The utility model provides a mould unloading three-plate injection molding machine exempts from in continuous moulding plastics, includes tailboard (15), movable mould board (16), fixed die plate (17) and injection structure (18), is provided with injection mold between movable mould board (16) and fixed die plate (17), its characterized in that injection mold includes cover half (1) and movable mould (4), is provided with duplex position switching-over mold core in cover half (1) and movable mould (4), wears to establish the duplex position switching-over mold core that can reciprocating motion along perpendicular to cover half (1) axle center direction, duplex position switching-over mold core including two switching-over mold cores (7) that set up side by side, still be provided with ejecting hydro-cylinder (13) that are used for ejecting goods on movable mould board (16).

2. The continuous injection mould-free three-plate injection molding machine according to claim 1, wherein the reversing mold core (7) is provided with an ejection cavity (111) and an injection cavity (112) which are mutually independent and adjacent along the axial direction.

3. The continuous injection mould-free three-plate injection molding machine according to claim 2, wherein the injection molding cavity (112) is configured in a structure with one open end, a preset number of guide rods (10) are arranged in the injection molding cavity (112) along the horizontal direction, a sub-movable mould (9) is arranged in the injection molding cavity (112) through sliding connection, the end part of the guide rod (10) is provided with an expansion structure (116), the end part of the guide rod (10) is sleeved with a return spring (117), the guide rod (10) penetrates through the movable sub-die (9), the outer side end of the movable sub-die (9) is provided with a groove (115) which is connected with the return spring (117) in a clamping manner, the axis of the movable sub-die (9) is provided with a boss (113) and a pouring gate (114), the outer side end face of the boss (113) is consistent with the side end face of the reversing die core (7), and the bottom of the injection molding cavity (112) is provided with a discharge hole.

4. The continuous injection mould-free three-plate injection molding machine according to claim 2, wherein an ejector plate (124) is arranged in the ejector cavity (111) through sliding connection, a long ejector rod (122) and a short ejector rod (123) with different lengths are arranged on the inner side of the ejector plate (124) along the horizontal direction, the long ejector rod (122) penetrates through a partition plate to be matched with the movable sub-mold (9), and a product ejection structure is further arranged on the partition plate of the ejector cavity (111) and the partition plate of the injection cavity (112).

5. The continuous injection mould-opening-free three-plate injection molding machine according to claim 4, wherein the product ejection structure comprises a positioning column (121), a top plate (119) penetrates through the outer side of the positioning column (121), a spring is arranged on the inner side of the top plate (119), a limiting plate (120) is arranged on the outer side of the top plate (119), a thimble (118) is arranged on the top plate (119) along the axis direction, the thimble (118) penetrates through a partition plate to be matched with a product of the injection molding cavity (112), and the top plate (119) is in clearance fit with the short ejection rod (123).

6. The continuous injection mould-opening-free three-plate injection molding machine according to any one of claims 1 to 5, wherein a positioning oil cylinder (3) is arranged on the upper end surface of the fixed mould (1), a conical positioning block concentric with a sprue (114) for positioning the movable sub-mould (9) and a central sprue (114) of the fixed mould (1) is arranged at the front end of the positioning oil cylinder (3), a reversing motor (2) is further arranged on the upper end surface of the movable mould (4), and the reversing motor (2) is matched with a rack (8) arranged on the upper end surface of the reversing mould core (7) in a meshing manner through a transition gear (6).

7. The continuous injection mould-free three-plate injection molding machine according to claim 6, wherein a product sliding plate (12) is further arranged below the discharge port, and a conveying belt (11) is arranged below the product sliding plate (12).

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