CN106891484A - A kind of Novel threaded side core-pulling injection molding - Google Patents

Abstract

The invention relates to the technical field of moulds, in particular to a novel threaded side core-pulling injection mold, in which the fixed plate and the fixed plate are fixed by connecting screws; the main core passes through the fixed plate; the screw shaft passes through the fixed plate; The rack nut is set on the screw shaft; the rack nut and the gear are connected by a gear pair; the side core and the gear are connected by a key; the side core is inserted into the cavity plate; the side core is covered with a spring; the cavity plate It is fixed with the cavity fixed plate by connecting screws; the movable mold seat plate is fixed with the cavity plate by long screws; there is a push plate fixed plate in the cavity plate; the push plate fixed plate and the push plate are fixed by connecting screws; One end of the push rod and the reset rod is fixed in the push plate, and the other end of the push rod and the reset rod is movably inserted into the cavity plate; the bottom of the cavity plate is welded with a support plate; a new threaded side core pulling injection mold of the present invention , it realizes synchronous lateral core-pulling when opening the mold, and has a simple structure and is easy to use, and is also suitable for core-pulling of lateral threaded holes with various pitches and the lateral core-pulling distance is adjustable.

Description

A New Thread Side Core Pulling Injection Mold

technical field

The invention relates to the technical field of molds, in particular to a novel thread side core-pulling injection mold.

Background technique

When forming a plastic part with threaded holes on the side, it is necessary to use a threaded side core. Before the plastic part is demolded, the threaded side core is pulled out, and then the plastic part is ejected from the cavity. The core pulling of the threaded core has two actions, the rotary motion of the threaded core and the linear movement, so as to complete the thread removal action.

There are three types of traditional thread side core-pulling mechanisms: 1) manual core-pulling outside the mold is used, which is inefficient; 2) motor-driven thread removal is used, and the mechanism needs to design a circuit to drive the motor, which is troublesome; 3) mold-opening force to remove the thread At present, the structure of the mechanism is complex and the lateral core-pulling distance or pitch cannot be adjusted; these limit its application range.

Contents of the invention

The object of the present invention is to aim at the defects and deficiencies of the prior art, and provide a new type of threaded side core-pulling injection mold with simple structure, reasonable design and convenient use, which includes a fixed template, a fixed mold fixed plate, a main core, Side core, gear, rack nut, screw shaft, connecting screw, spring, cavity fixed plate, cavity plate, reset lever, long screw, push rod, push plate, push plate fixed plate, movable mold seat plate, support The fixed plate and the fixed plate are fixed by connecting screws; the main core passes through the fixed plate; the screw shaft passes through the fixed plate; the rack nut is sleeved on the screw shaft; the gear pair is between the rack nut and the gear Connection; the side core and the gear are connected by a key; the side core is inserted into the cavity plate; the side core is covered with a spring; the cavity plate and the cavity fixed plate are fixed by connecting screws; the movable mold seat plate is passed by a long screw The cavity plate is fixed with the cavity plate; there is a push plate fixing plate in the cavity plate; the push plate fixing plate and the push plate are fixed by connecting screws; one end of the push rod and the reset rod is fixed in the push plate, and the other end of the push rod is inserted Connected to the cavity plate; the reset rod is inserted into the cavity plate and the cavity fixing plate; the bottom of the cavity plate is welded with a support plate.

After adopting the above-mentioned structure, the beneficial effect of the present invention is: a novel screw thread side core-pulling injection mold according to the present invention, which uses a rack and pinion mechanism to rotate and move the side core when opening the mold, so that the side core can move from the mold to the side core. It can be ejected from the side threaded hole of the part to complete the thread removal action, thus forming a plastic part with a side threaded hole; it realizes synchronous lateral core pulling when the mold is opened, which greatly improves the work efficiency, and has a simple structure and is easy to use. It is also suitable for core-pulling of lateral threaded holes with various pitches, and the lateral core-pulling distance is adjustable.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application, but do not constitute an improper limitation of the present invention. In the accompanying drawings:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural schematic view of the present invention when the mold is opened.

Explanation of reference signs:

1-fixed template, 2-fixed mold plate, 3-main core, 4-side core, 5-gear, 6-rack nut, 7-screw shaft, 8-connecting screw, 9-spring, 10- Cavity fixed plate, 11-cavity plate, 12-reset rod, 13-long screw, 14-push rod, 15-push plate, 16-push plate fixed plate, 17-movable mold seat plate, 18-support plate, 20-plastic parts, 1-1 inclined bracket, 11-1 rail groove.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, wherein the schematic embodiments and descriptions are only used to explain the present invention, but are not intended to limit the present invention.

As shown in Figure 1-2, a new threaded side core-pulling injection mold described in this specific embodiment includes a fixed template 1, a fixed mold fixed plate 2, a main core 3, a side core 4, a gear 5, Rack nut 6, screw shaft 7, connecting screw 8, spring 9, cavity fixing plate 10, cavity plate 11, reset lever 12, long screw 13, push rod 14, push plate 15, push plate fixing plate 16, moving Die base plate 17, support plate 18; fixed formwork 1 and fixed formwork fixed plate 2 are fixed by connecting screws 8; main core 3 passes through fixed formwork 1; screw shaft 7 passes through fixed formwork 1; rack nuts 6 sets On the screw shaft 7 and connected by a key; the rack nut 6 and the gear 5 are connected by a gear pair; the side core 4 and the gear 5 are connected by a key; the side core 4 is inserted into the cavity plate 11; the side core 4 The upper cover is covered with a spring 9; the cavity plate 11 and the cavity fixing plate 10 are fixed by connecting screws 8; the movable mold seat plate 17 is fixed by long screws 13 and the cavity plate 11; the cavity plate 11 is fixed by a push plate Plate 16; push plate fixing plate 16 and push plate 15 are fixed by connecting screw 8; one end of push rod 14 and reset rod 12 is fixed in push plate 15, and the other end of push rod 14 is movably inserted in cavity plate 11 ; The reset rod 12 is inserted into the cavity plate 11 and the cavity fixing plate 10 ; the bottom of the cavity plate 11 is welded with a support plate 18 .

Further: the central part of the fixed template 1 is provided with a main core channel, and the bottom of the fixed template 1 is provided with an inclined bracket 1-1.

Further: the upper end of the side core 4 has an external thread; the bottom end of the side core 4 is a cylindrical head, and the side of the lower end of the cylindrical head is an inclined plane.

Further: the center of the gear 5 is provided with an inner hole.

Further: the middle part of the rack nut 6 is provided with an internal thread.

Further: the screw shaft 7 is provided with an external thread; one end of the screw shaft 7 is provided with a cylindrical head, and the cylindrical head is located in the fixed plate 1 .

Further: the cavity plate 11 is provided with a guide rail groove 11-1; the cavity plate 11 is also provided with a reset rod channel and a push rod channel.

A new threaded side core-pulling injection mold according to the present invention has a threaded hole in the middle of its rack nut 6, and a rack on one side of the outer surface; the top of the side core 4 has an external thread, and the pitch of the external thread and the plastic The pitch of the side threaded holes of the parts is the same, which is used to form the side threaded holes of the plastic parts; the other end of the side core 4 is a cylindrical head, and there is a slope at the lower end of the head; the bottom of the fixed template 1 also has a corresponding slope; the inclination angles of the two slopes are the same , when the mold is closed, they are in contact with each other; the spring 9 is assembled between the cylindrical head of the side core 4 and the cavity plate 11 . The side core 4 and the gear 5 are connected by a key; the side core 4 and the gear 5 are connected by a gear pair; the rack nut 6 and the screw shaft 7 are threaded; the rack nut 6 is located in the track groove in the cavity plate 11; The present invention is a novel threaded side core-pulling injection mold, which uses a rack and pinion mechanism to rotate and move the side core 4 when opening the mold from the parting surface of the cavity fixed plate 10 and the fixed template 1, so that the threaded side core 4 Release the mold from the side threaded hole of the plastic part to complete the thread removal action, thereby forming a plastic part with a side threaded hole.

Specific thread side core pulling process:

After the plastic part is formed, the mold is opened by the parting surface of the cavity fixing plate 10 and the fixed template 1. When the mold is opened, the rack nut 6 drives the gear 5 to rotate, and drives the side core 4 to rotate and move to complete the thread removal action. The support plate 18 and the compression spring 9 form the positioning device of the side core 4, under the action of the spring force and the support plate 18, the lower end plane of the cylindrical head of the side core 4 is fitted with the upper part of the support plate 18 and kept at a suitable position. Position, so that the slope of the side core 4 fits with the inclined bracket 1-1 at the bottom of the fixed template 1 when the mold is closed, so as to realize the smooth reset of the side core 4.

A novel thread side core-pulling injection mold according to the present invention, its working process:

After the plastic part is formed, the mold is opened by the parting surface of the cavity fixed plate 10 and the fixed template 1, as shown in Figure 2. When the mold is opened, the cavity plate 11, the cavity fixed plate 10, and the movable mold seat plate 17 move to the left, driving the side The core 4 and the gear 5 move to the left together, the fixed plate 1, the fixed plate 2, and the main core 3 do not move, and the screw shaft 7 and the rack nut 6 also do not move; thus the rack part on the rack nut 6 The drive gear 5 rotates to drive the side core 4 to rotate synchronously, and the side core 4 moves outward while rotating to complete the core-pulling action of the side threaded hole; Slide on the bracket 1-1 and gradually disengage until it is separated. The separated side core 4 is tightly attached to the support plate 18 of the cavity plate 11 under the force of the spring 9 and remains at this position. The mold opening is completed. After that, the push plate fixing plate 16 moves to the right under the action of external force, and drives the push rod 14 to also move to the right, so that the plastic part is pushed out from the cavity plate 11, and the demoulding of the entire plastic part is completed; The slope of the core 4 starts to contact the inclined bracket 1-1 of the fixed template 1, and the side core 4 continuously overcomes the force of the spring 9 under the action of the slope, and moves inward to complete the reset; reset under the action; thus waiting for the next injection.

Another innovative point of the present invention is: as long as the side cores 4 of different pitches are replaced, the core-pulling of the lateral threaded holes of different pitches can be realized, so the versatility is good, and there is no need to replace the whole set of molds again; in addition, the size of the lateral core-pulling pitch It can be adjusted. From the design structure, it can be seen that the greater the distance between the left side of the rack nut 6 and the axis of the side core 4, the greater the lateral core-pulling distance. The rack nut 6 can be rotated before assembly so that Adjust the axial position of the rack on the screw shaft 7. After the installation is completed, the left end of the screw shaft 7 can also be turned by using a tool, so that the rack nut 6 can move a small distance left and right, thereby adjusting the left side of the rack. The distance between the surface and the axis of the side core 4 can more precisely control the distance of core pulling.

A new threaded side core-pulling injection mold according to the present invention uses a rack and pinion mechanism to rotate and move the side core during mold opening, so that the side core is ejected from the side threaded hole of the plastic part, and the mold is completed. Thread removal action, so as to form plastic parts with side threaded holes; it realizes synchronous lateral core pulling when opening the mold, greatly improves work efficiency, and has a simple structure, easy to use, and can also be applied to lateral threads of various pitches The core-pulling of the hole and the lateral core-pulling distance are adjustable.

The above is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims (7)

1. A new threaded side core-pulling injection mold, characterized in that it includes a fixed plate (1), a fixed plate (2), a main core (3), a side core (4), and a gear (5) , rack nut (6), screw shaft (7), connecting screw (8), spring (9), cavity fixing plate (10), cavity plate (11), reset lever (12), long screw (13 ), push rod (14), push plate (15), push plate fixed plate (16), movable formwork seat plate (17), support plate (18); fixed formwork (1) and fixed formwork fixed plate (2) The space is fixed by connecting screws (8); the main core (3) passes through the fixed template (1); the screw shaft (7) passes through the fixed template (1); the rack nut (6) is set on the screw shaft (7) ;The rack nut (6) and the gear (5) are connected by a gear pair; the side core (4) and the gear (5) are connected by a key; the side core (4) is inserted into the cavity plate (11); The core (4) is covered with a spring (9); the cavity plate (11) and the cavity fixing plate (10) are fixed by connecting screws (8); the movable mold seat plate (17) is fixed by a long screw (13) and the cavity plate (11) are fixed; the cavity plate (11) is provided with a push plate fixing plate (16); the push plate fixing plate (16) and the push plate (15) are fixed by connecting screws (8); One end of the rod (14) and reset rod (12) is fixed in the push plate (15), and the other end of the push rod (14) is movably inserted into the cavity plate (11); the reset rod (12) is inserted into the cavity plate ( 11) and the cavity fixing plate (10); the bottom of the cavity plate (11) is welded with a support plate (18). 2. A new type of threaded side core-pulling injection mold according to claim 1, characterized in that: the middle part of the fixed plate (1) has a main core channel, and the bottom of the fixed plate (1) is provided with an inclined bracket seat (1-1). 3. A new type of threaded side core-pulling injection mold according to claim 1, characterized in that: the upper end of the side core (4) has an external thread; the bottom end of the side core (4) is a cylindrical head, the cylinder The side of the lower end of the shaped head is a slope. 4. A new thread side core-pulling injection mold according to claim 1, characterized in that: the center of the gear (5) is provided with an inner hole. 5. A new thread side core-pulling injection mold according to claim 1, characterized in that: the middle part of the rack nut (6) is provided with an internal thread. 6. A new thread side core-pulling injection mold according to claim 1, characterized in that: the screw shaft (7) is provided with an external thread; one end of the screw shaft (7) is provided with a cylindrical head, and the cylindrical head is located at In the given template (1). 7. A new type of thread side core-pulling injection mold according to claim 1, characterized in that: the cavity plate (11) is provided with guide rail grooves (11-1); the cavity plate (11) is also provided with It is equipped with a reset rod channel and a push rod channel.