CN207028096U - Nib cavity injection mold structure - Google Patents

Abstract

The utility model discloses a nib multi-cavity injection mold structure, which comprises a fixed mold and a movable mold located below the fixed mold. A stripping plate is arranged under the fixed mold, and an A plate is arranged under the stripping plate. A plate B that can be attached to plate A is arranged on the top of the movable mold, and a number of cavities are arranged between the plate A and the plate B. There are several gear transmission groups in the movable mold, and the gear transmission groups include idler gears and several The core gear is meshed with the idler gear. There are several fixed cores and threaded cores protruding into the cavity in the movable mold. The threaded cores are rotatably set outside the fixed cores. The threaded cores and The core gear is fixedly connected, and the middle part of the movable mold is equipped with a main shaft gear and a double gear corresponding to the gear transmission group. Gear mesh transmission. The utility model aims to provide a nib multi-cavity injection mold structure with high cavity number expansion.

Description

Nib multi-cavity injection mold structure

technical field

The utility model belongs to the field of nib molds, in particular to a nib multi-cavity injection mold structure.

Background technique

As a part of the pen holder, the nib is usually molded by injection molding, such as the Chinese patent announcement number: CN203510649U, which discloses a plastic mold for the pen holder of an electronic pen, including a static template, a cavity plate and a moving template, and the cavity plate is provided with a cavity , The gate connected with the cavity and the runner connected with the gate, there are 8 cavities on the cavity plate, the dimensions of the 8 cavities are exactly the same, and the 8 cavities are parallel and juxtaposed along the horizontal direction Arrangement, every two cavities are a unit, and the two cavities of each unit are connected through a runner, and the runner is connected with the corresponding gate; the shape of the cavity is consistent with the shape of the penholder; the shape of the cavity One side is provided with a chute, and a push rod is arranged on the chute, and the push rod is opposite to the cavity, and one end of the push rod is fixed on the connecting rod, and the connecting rod is drivingly connected with the piston rod of the cylinder. At present, the multi-cavity transmission layout is mainly directly transmitted to the stripping core corresponding to each cavity through a main shaft. Each cavity is arranged around the main shaft. The transmission chain is simple, but as the number of cavities increases, the space in the center of the mold will be wasted. ; There is also the number of product cavities concentrated on the mold axis, and the cavities are arranged along the mold axis, but the number of cavities cannot be too much.

Utility model content

The utility model aims at overcoming the above-mentioned deficiencies in the prior art, and provides a multi-cavity injection mold structure of a nib with a high cavity number expansion.

In order to achieve the above object, the utility model adopts the following technical solutions:

A nib multi-cavity injection mold structure, comprising a fixed mold and a movable mold positioned below the fixed mold, a stripper plate is arranged under the fixed mold, an A plate is arranged under the stripper plate, and an A plate is arranged above the movable mold There is a plate B that can be attached to the plate A. There are several cavities between the plate A and the plate B. There are several gear transmission groups in the movable mold. core gear, the movable mold is provided with a number of fixed cores and threaded cores extending into the cavity, the threaded cores are rotatably sleeved on the outside of the fixed cores, and the threaded cores The core and the core gear are fixedly connected, and the middle part of the movable mold is equipped with a main shaft gear and a double gear corresponding to the gear transmission group. A core gear meshes the drive. In this way, the top of the thread core extends into the cavity for forming the internal thread of the nib. Mold opening means that the main shaft gear can transmit power to each threaded core through the double gear and the gear transmission group, and the threaded core rotates relative to the fixed core to realize the demoulding of the internal thread. One of the core gears of the gear transmission set is driven by the double gear, and the power of this core gear is transmitted to the rest of the core gears in the gear transmission set through the idler gear, so the scalability is improved and the number of cavities can be greatly increased. and flexibility.

As a preference, the bottom of the stripper plate is provided with a stripping insert, and the top of the plate A is provided with a flow channel insert corresponding to the position of the stripping insert, and the stripping insert and the flow channel insert A runner cavity is formed between them, and the fixed mold is provided with a stripper ejector penetrating through the stripper plate, and the stripper ejector penetrates the stripper insert and acts on the runner cavity.

As a preference, the stripping ejector includes a stripping cylinder and a stripping spring acting downward on the stripping cylinder, a spring chamber for accommodating the stripping spring is arranged in the fixed mold, and the stripping column The top of the body is provided with a limit column, and the top of the spring chamber is provided with a positioning hole which slides with the limit column.

As a preference, the movable mold is provided with spacer screws that limit the position of the B plate, the tail of the spacer screw is screwed to the movable mold, and the length of the spacer screw is greater than the thickness of the B plate.

As a preference, the movable mold is provided with a pusher ejector, and the pusher ejector includes a pusher cylinder acting on the B plate and a pusher spring that pushes the pusher cylinder to move upwards, and the movable mold There is a limit hole which slides with the cylinder of the push piece inside.

As a preference, the fixed mold is provided with a tie rod for limiting the A plate, and the pull rod includes a limit sleeve and a rod, and the upper ends of the limit sleeve and the rod are fixed to the stripper plate by a limit screw , the fixed mold is provided with a stepped groove for accommodating the spacer sleeve body, when the fixed mold and the stripper plate are fitted together, there is an interval between the spacer surface of the spacer sleeve body and the stepped surface of the stepped groove, and the lower end of the rod body There is a lower limit part positioned with the bottom of A plate.

As a preference, a limit rod is provided between the A board and the B board, the side of the A board is provided with an upper limit seat for locating the upper end of the limit rod, and the side of the B board is provided with a limit seat. The lower positioning seat that the rod is slidably matched to, the lower end of the limiting rod is provided with a limiting end that is limited to the bottom of the lower positioning seat.

The beneficial effects of the utility model are: (1) Effectively expand the number of cavities and improve production efficiency; (2) Effectively prevent the coagulation between the coagulation material and the mold, so that the coagulation material can be smoothly released when the mold is opened, and it is convenient for the manipulator to clamp the coagulation material (3) Carry out stable and reliable positioning of each plate body of the mold to realize stable and reliable mold opening.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is the top view of the utility model;

Fig. 3 is a schematic diagram of the structure when the runner parting surface of the utility model is opened;

Fig. 4 is a schematic diagram of the structure of the utility model when the scraping parting surface of the runner is opened;

Fig. 5 is a structural schematic diagram when the main parting surface of the utility model is opened;

Fig. 6 is a schematic structural view of the utility model when it is fully opened.

In the figure: main shaft gear 1, main shaft 2, duplex gear 3, fixed core 4, core gear 5, idler gear 6, movable mold 7, threaded core 8, push piece ejector 9, push piece cylinder 9a, Push piece spring 9b, lower mold core 10, B plate 11, lower positioning seat 11a, A plate 12, upper limit seat 12a, stripping plate 13, fixed mold 14, positioning hole 14a, upper mold core 15, stripping ejector 16. Stripping cylinder 16a, limit column 16b, stripping spring 16c, runner cavity 17, gate 18, nozzle hook 19, stripping insert 20, runner insert 21, tie rod 22, limit Sleeve body 22a, rod body 22b, distance screw 23, limit rod 24, aggregate 25, upper Latin 26, positioning groove 26a, lower Latin 27, positioning block 27a.

detailed description

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

In the embodiment shown in Fig. 1, Fig. 2, a kind of nib multi-cavity injection mold structure, comprises fixed mold 14 and the movable mold 7 that is positioned at the fixed mold below, wherein, is provided with sprue 18 on the fixed mold, fixed mold A stripper plate 13 is provided below the stripper plate, an A plate 12 is provided below the stripper plate, and a B plate 11 that can be bonded to the A plate is provided above the movable mold. The fixed mold is equipped with an upper guide column that penetrates the stripper plate, A plate and B plate downwards, and the movable mold is equipped with a lower guide column that penetrates upwards through the B plate, A plate and the stripper plate, and the upper guide column and the lower guide column They are arranged vertically to guide the movement of the stripper plate, plate A and plate B.

The bottom of the stripper plate is provided with a stripper insert 20, and the top of plate A is provided with a flow channel insert 21 corresponding to the position of the stripper insert, and a flow channel cavity 17 is formed between the stripper insert and the flow channel insert , the fixed mold is provided with a nozzle hook 19 extending into the runner cavity. There is a nylon pulley and a limit rod 24 between the A plate and the B plate. The nylon pulley includes an upper pulley 26 and a lower pulley 27. The upper pulley is fixed to the A plate, and the lower pulley is fixed to the B plate. The lower end of the upper pulley is provided with a positioning groove. 26a, the upper end of the lower Latin is provided with a positioning block 27a tightly fitted with the positioning groove. The side of A plate is provided with the upper limit seat 12a that is used to locate the upper end of the limit rod, the side of B plate is provided with the lower positioning seat 11a that slides with the limit rod, and the lower end of the limit rod is provided with the bottom of the lower positioning seat. The limit end of the limit. The fixed mold is provided with a pull bar 22 for limiting the A plate, and the pull bar includes a limit sleeve body 22a and a rod body 22b. The stepped groove of the bit sleeve body, when the fixed mold and the stripper plate are fitted, there is an interval between the limiting surface of the limiting sleeve body and the step surface of the stepped groove, and the lower end of the rod body is provided with a lower limiting portion positioned with the bottom of the A plate. The movable mold is provided with a spacer screw 23 that limits the position of the B plate, and the afterbody of the spacer screw is threadedly connected with the movable mold, and the length of the spacer screw is greater than the thickness of the B plate.

There are several upper mold cores 15 in plate A, and lower mold cores 10 corresponding to the upper mold cores are arranged in plate B, a mold cavity is formed between the upper mold cores and the lower mold cores, the gate of the fixed mold and the runner cavity, flow The channel cavity communicates with each cavity. The fixed mold is provided with a stripping pop-up 16 that runs through the stripping plate and the stripping insert. The stripping pop-up includes a stripping cylinder 16a and a stripping spring 16c acting downward on the stripping cylinder. The stripping cylinder Acting in the runner cavity, the fixed mold is provided with a spring chamber for accommodating the stripping spring. The top of the stripping cylinder is provided with a limiting post 16b, and the top of the spring chamber is provided with a positioning hole 14a slidingly fitted with the limiting post. A pusher spring 9 is provided on the movable mold, and the pusher spring includes a pusher cylinder 9a acting on the B plate and a pusher spring 9b that pushes the pusher cylinder to move upwards. Slip-fit limit holes.

As shown in Figure 2, the middle part of the movable mold is provided with a main shaft 2, a main shaft gear 1 fixed to the main shaft, and four double gears 3 arranged around the main shaft gear, and the lower end of the double gear is meshed with the main shaft gear for transmission. Four gear transmission groups are arranged in the moving mold, and the four gear transmission groups are arranged in a rectangular shape in the moving mold. The gear transmission groups include an idler gear 6 and four core gears 5 meshing with the idler gear. The gear transmission set includes an idler gear and four core gears meshed with the gear set. There are a number of fixed cores 4 and threaded cores 8 extending into the cavity in the movable mold. The threaded cores are sleeved on the fixed The outside of the core can rotate relative to the fixed core. The threaded core and the core gear are fixedly connected. The middle part of the movable mold is equipped with a main shaft gear and a double gear corresponding to the gear transmission group. The lower end of the double gear meshes with the main shaft gear. Transmission, the upper end of the duplex gear meshes with one of the core gears of the gear transmission set for transmission.

As shown in Figure 3, the parting surface of the runner is between the stripper plate and the plate A. When the mold is opened, the parting surface of the runner is opened first, and the condensate 25 is separated from the plate A. Afterwards, the flow channel between the fixed mold and the stripper plate is scraped out and the parting surface is separated, as shown in Figure 4. At this time, the stripping column of the stripping spring moves downward under the action of the stripping spring, and the flow channel cavity The condensate in the body is separated from the stripping plate, so as to realize the detachment of the condensate. As the mold opening force increases, plate A and plate B are separated by overcoming the effect of nylon latin, as shown in Figure 5, the main parting surface between plate A and plate B is opened, and the downward movement of plate B is limited The role of the bit rod. Finally, as shown in Figure 6, the B plate is separated from the movable mold to realize the complete opening of the mold, and the distance screws set on the movable mold can play a role of safety protection to prevent the B plate from falling out of the mold.

Claims (7)

1. A nib multi-cavity injection mold structure, comprising a fixed mold (14) and a movable mold (7) located below the fixed mold (14), characterized in that a stripper is provided under the fixed mold (14) plate (13), a plate A (12) is provided under the stripping plate (13), and a plate B (11) that can be attached to the plate A (12) is provided above the movable mold (7), and plate A There are several cavities between (12) and B plate (11), and there are several gear transmission groups inside the movable mold (7), and the gear transmission groups include idler gears (6) and several gears meshed with the idler gears (6). Driven core gear (5), the movable mold (7) is provided with several fixed cores (4) and threaded cores (8) extending into the cavity, and the threaded cores ( 8) Rotately sleeved outside the fixed core (4), the threaded core (8) is fixedly connected with the core gear (5), and the middle part of the movable mold (7) is provided with the main shaft gear (1) and the The double gear (3) corresponding to the gear transmission group, the lower end of the double gear (3) meshes with the main shaft gear (1) for transmission, and the upper end of the double gear (3) and one of the core gears (5) of the gear transmission group Engagement transmission. 2. The nib multi-cavity injection mold structure according to claim 1, characterized in that, the bottom of the stripping plate (13) is provided with a stripping insert (20), and the top of the A plate (12) A flow channel insert (21) corresponding to the position of the stripping insert (20) is provided, and a flow channel cavity (17) is formed between the stripping insert (20) and the flow channel insert (21). The above fixed mold (14) is provided with a stripping top (16) that penetrates the stripping plate (13), and the stripping top (16) penetrates the stripping insert (20) and acts on the flow channel cavity (17) Inside. 3. The nib multi-cavity injection mold structure according to claim 2, characterized in that, the stripping top (16) includes a stripping cylinder (16a) and acts downward on the stripping cylinder (16a) ) of the stripping spring (16c), the fixed mold (14) is provided with a spring chamber for accommodating the stripping spring (16c), and the top of the stripping cylinder (16a) is provided with a limit column (16b), The top of the spring chamber is provided with a positioning hole (14a) slidingly fitted with the limit post (16b). 4. The nib multi-cavity injection mold structure according to claim 1 or 2, characterized in that, the moving mold (7) is provided with spacer screws (23) that limit the position of the B plate (11), The afterbody of the distance screw (23) is threadedly connected with the movable mold (7), and the length of the distance screw (23) is greater than the thickness of the B plate (11). 5. The nib multi-cavity injection mold structure according to claim 1 or 2, characterized in that, the movable mold (7) is provided with a push piece ejection top (9), and the push piece ejection top ( 9) It includes the push piece cylinder (9a) acting on the B plate (11) and the push piece spring (9b) that pushes the push piece cylinder (9a) to move upward, and the movable mold (7) is equipped with the push piece A limiting hole for the sliding fit of the cylinder (9a). 6. The nib multi-cavity injection mold structure according to claim 1 or 2, characterized in that the fixed mold (14) is provided with a tie rod (22) for limiting the A plate (12), and the The pull rod (22) includes a limit sleeve body (22a) and a rod body (22b), and the upper ends of the limit sleeve body (22a) and the rod body (22b) are fixed to the stripper plate (13) by a limit screw, and the The fixed mold (14) is provided with a stepped groove for accommodating the limiting sleeve (22a). Spaces are provided between the surfaces, and the lower end of the rod body (22b) is provided with a lower limit portion positioned with the bottom of the A plate (12). 7. The nib multi-cavity injection mold structure according to claim 1 or 2, characterized in that a limit rod (24) is provided between the A plate (12) and the B plate (11), and the A The side of the plate (12) is provided with an upper limit seat (12a) for positioning the upper end of the limit rod (24), and the side of the B plate (11) is provided with a lower positioning seat that is slidingly matched with the limit rod (24). seat (11a), the lower end of the limiting rod (24) is provided with a limiting end that is limited to the bottom of the lower positioning seat (11a).