CN204701084U - End covers plastic part mould - Google Patents

Abstract

The utility model relates to the technical field of plastic part moulds, in particular to a plastic part mold for end caps, which includes a forming mechanism, a pouring system, a cooling device, a lateral core-pulling mechanism and a lateral parting mechanism; the forming mechanism includes a die , the punch and the side core slider, the side core slider, the die and the punch are molded together to form a cavity that matches the plastic part, the pouring system communicates with the cavity, and the cooling device and the lateral core-pulling mechanism are all arranged on the molding mechanism, and the lateral parting mechanism is arranged below the molding mechanism. The end cap plastic part mold of the utility model simplifies the mold structure and improves the practical performance .

Description

End cap plastic parts mold

technical field

The utility model relates to the technical field of molds for plastic parts, in particular to a mold for plastic parts such as end caps.

Background technique

With the development of society and the improvement of human living standards, people's requirements for plastic products are increasing day by day. Not only should they have the required effect, but also should have a beautiful appearance. Driven the rapid development of plastic molds. As shown in Figure 11, the structure of end cap plastic parts is complex, and the edges of the plastic parts are thin and easy to be damaged during demoulding. The cooling channels on traditional molds are generally flat and relatively easy to process, but the actual use effect is not ideal. The looseness of the formwork during use will cause water leakage, so three-dimensional cooling water channels are generally used. The water channels pass through the mold cores and extend into the fixed formwork, and then pass through the movable formwork. The effect of free fall will accumulate at the lower end of the pipe and cannot be discharged, resulting in local water accumulation. Due to poor cooling effect, the water accumulation will cause local overheating of the plastic parts and burn them out, resulting in a decrease in the strength and quality of the plastic parts; There are two kinds of rods, one is Z-shaped, and the other is inverted cone. When the Z-shaped pull rod is demolded, the aggregate hangs on the pull rod and cannot fall off automatically. It needs manual separation. The material rod needs to open the cold cavity on the moving platen to be narrow at the top and wide at the bottom, which is difficult to process and requires a special process.

Utility model content

The technical problem to be solved by the utility model is: in order to solve the problem of difficult processing of end cap plastic parts, a mold for end cap plastic parts is now provided.

The technical solution adopted by the utility model to solve the technical problem is: a mold for end cap plastic parts, including a forming mechanism, a pouring system, a cooling device, a lateral core-pulling mechanism and a lateral parting mechanism;

The molding mechanism includes a die, a punch and a side core slider, and the side core slider, the die and the punch are molded together to form a cavity that matches the plastic part;

The pouring system communicates with the mold cavity, the cooling device and the lateral core-pulling mechanism are both arranged on the molding mechanism, and the lateral parting mechanism is arranged below the molding mechanism.

Further, the molding mechanism also includes a fixed template and a movable template, the concave mold and the punch are arranged between the fixed template and the movable template, the concave mold is fixed on the fixed template, and the convex mold is fixed on On the movable formwork, a runner is provided on the opposite side of the punch and the die, gates are provided at both ends of the runner, and a coagulation hole is arranged on the center of the runner on the punch, The inner wall of the condensate cavity is provided with several grooves. When the mold is opened, the grooves on the inner wall of the condensate cavity are used to hook the cold material inside to pull out the condensate. When demoulding, the condensate is pushed out of the mold by the pulling rod. , to achieve fully automatic demoulding, two gap feeding can reduce the generation of welding lines.

In order to reduce the processing amount of the sprue marks of the sprue bushing, further, the pouring system includes a sprue bushing, and the sprue bushing passes through the fixed plate and the die in sequence to communicate with the cavity, and the sprue bushing is provided with There is a tapered main channel, the small end of which is located at the feed end of the sprue sleeve, and the width of the tapered main channel is gradually enlarged in the direction of the runner, which can ensure that when the gate is broken, the The tapered sprue of the sleeve is broken at the smallest width, and the gate marks only need to be repaired less, which reduces the subsequent processing time.

Further, the lateral core-pulling mechanism includes a cylindrical slanted guide post, the slanted guide post is fixed on the fixed plate, and the side core slider is provided with a slanted hole matching the slanted guide post , the slanted guide post is slidingly connected with the slanted hole, a plane is provided on the side of the slanted guide post, the side core slider is slidably installed on the movable template, the plane on the slanted guide post is connected to the inclined There is a gap between the holes to form a space avoidance, which is beneficial to the smooth guide sliding of the inclined guide post in the inclined hole.

Further, the lateral parting mechanism includes a push rod fixing seat, a push plate, an inclined top and a movable mold base, and the push rod fixing seat, the push plate and the movable mold base are sequentially installed under the movable template, and the movable template and A number of springs are installed between the push rod fixing seats, a through hole matching the inclined top is provided on the punch, an inclined top hole is arranged on the movable template below the through hole, and the inclined top is arranged on the movable template. The bottom of the roof is slidingly connected with the push plate, the top of the roof passes through the hole of the roof and is located in the through hole, and there is a gap between the side wall of the roof and the hole of the roof.

In order to ensure that the side core slider is reliably drawn out and reset, further, the side core slider is provided with a T-shaped guide rail, and the movable template is provided with a chute, and the movable template is located in the chute Beads are arranged on both sides of the bead, and a T-shaped slot matching the T-shaped guide rail is formed between the bead and the chute, and the chute is easy to process, while the traditional T-shaped slot needs to be replaced with a special T-shaped milling machine during processing. Knife processing is time-consuming and labor-intensive.

Further, a protrusion is provided on the top end surface of the inclined roof, and the protrusion is in contact with the side surface and the top surface of the inner cavity of the plastic part, and the lower end surface of the side of the plastic part is in contact with the top end surface of the inclined roof, and the The thickness L2 of the side of the plastic part in contact with the top end surface of the top is less than the distance L from the outermost point on the top end surface of the top end surface of the top to the protrusion. The edge of the plastic part is strained or deformed. On the other hand, the part extending from the edge of the plastic part at the top end can help the inclined roof to reset. It will first contact the die for reset when the mold is closed, and there is no need to add a reset rod.

In order to prevent local accumulation of water, resulting in poor cooling effect at the accumulation of water, further, the cooling device includes multiple cooling water channels, and each cooling water channel passes through the movable platen, punch, fixed plate and die in sequence, The water inlet of the cooling water channel is set on the movable formwork, and the water outlet of the cooling water channel is set on the fixed formwork, and the cooling water is discharged layer by layer from the lower end, so there is no problem of water accumulation and better cooling effect is obtained.

Further, the condensate hole is provided with a matching pull rod, and the pull rod is fixed on the push rod fixing seat.

In order to prevent the bead from shifting on the movable template, further, the bead is provided with a positioning block, and the movable template is provided with a positioning groove matching the positioning block, and the positioning block snaps into the positioning In the groove, the bead will not shift on the movable template because the positioning block is snapped into the positioning groove on the movable template, which ensures the sliding of the side core slider on the movable template.

The beneficial effects of the utility model are: the mold of the end cap plastic part of the utility model hooks the cold material inside through the groove on the inner wall of the condensate cavity and pulls out the condensate, so that the plastic part and the pouring system condensate and Automatic separation of the mould; the sprue sleeve is equipped with a tapered main channel, which can be broken at the gate when the plastic part and the gate are broken, and the gate marks only need to be repaired less or not; through the bead and the chute A T-shaped slot matching the T-shaped guide rail is formed between them, so that the movable template only needs to be milled with a milling cutter, which is convenient for mold repair and grinding, simplifies the processing technology, and ensures the reliability of the bead. By setting a plane on the side of the inclined guide column, There is a gap between the plane on the inclined guide post and the inclined hole, which is conducive to the smooth and reliable guiding of the inclined guide post; by processing the inclined top hole into a square straight hole, it is sufficient to reserve the displacement space of the inclined top during movement. The mold structure is greatly simplified and the processing difficulty is reduced; by setting the water inlet of the cooling water channel below the water outlet, water accumulation in the cooling water channel is avoided, and a better cooling effect is obtained.

Description of drawings

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

Fig. 1 is the schematic diagram of the best embodiment of the utility model end cap type plastic mold;

Fig. 2 is a partially enlarged schematic diagram of A in Fig. 1;

Fig. 3 is a three-dimensional schematic diagram of the connection between the side core slider and the movable template in the best embodiment of the end cap plastic part mold of the present invention;

Fig. 4 is a partially enlarged schematic diagram of C in Fig. 3;

Fig. 5 is a schematic diagram of the three-dimensional structure of the lateral parting mechanism in the best embodiment of the end cap plastic parts mold of the utility model;

Fig. 6 is a partially enlarged schematic diagram of B in Fig. 5;

Fig. 7 is a three-dimensional structural schematic diagram of the inclined roof in the best embodiment of the end cap plastic part mold of the present invention;

Fig. 8 is a schematic diagram of the three-dimensional structure of the sprue bushing in the best embodiment of the end cap plastic part mold of the present invention;

Fig. 9 is a D-D sectional view in Fig. 8;

Fig. 10 is a schematic diagram of the water inlet and water outlet of the cooling device in the best embodiment of the end cap plastic part mold of the present invention;

Fig. 11 is a schematic diagram of the structure of end cap-like plastic parts.

Fig. 12 is the left side view of the inclined top in the end cap plastic part mold of the present invention;

Fig. 13 is a top view of the inclined roof in the end cap plastic part mold of the present invention;

Fig. 14 is a schematic diagram of the contact between the top end surface of the inclined top and the side of the plastic part in the mold of the end cap plastic part of the present invention.

In the figure: 1. Concave die, 2. Punch die, 3. Side core slider, 4. Cavity, 5. Fixed die plate, 6. Moving die plate, 7. Runner, 8. Notch, 9. Agglomerate hole , 10, groove, 11, sprue sleeve, 12, tapered main channel, 13, inclined guide post, 14, inclined hole, 15, plane, 16, push rod fixing seat, 17, push plate, 18, inclined top , 19, movable mold base, 20, spring, 21, through hole, 22, inclined top hole, 23, chute, 24, bead, 25, protrusion, 26, top end face of inclined top, 27, water inlet, 28 , water outlet, 29, pulling rod, 30, positioning block, L, the distance from the outermost point on the top end surface of the inclined roof to the protrusion, L1, the thickness of the side of the plastic part in contact with the top end surface of the inclined roof .

Detailed ways

Now in conjunction with accompanying drawing, the utility model is described in further detail. These drawings are all simplified schematic diagrams, and only schematically illustrate the basic structure of the utility model, so they only show the configurations related to the utility model.

Example 1

As shown in Figure 1, a mold for end cap plastic parts includes a molding mechanism, a pouring system, a cooling device, a lateral core-pulling mechanism, and a lateral parting mechanism;

The molding mechanism includes a die 1, a punch 2 and a side core slider 3, and the side core slider 3, die 1 and punch 2 are molded together to form a cavity 4 that matches the plastic part;

The pouring system communicates with the mold cavity 4, the cooling device and the lateral core-pulling mechanism are both arranged on the molding mechanism, and the lateral parting mechanism is arranged below the molding mechanism.

As shown in Figures 2, 5 and 6, the molding mechanism also includes a fixed template 5 and a movable template 6, the concave die 1 and the punch 2 are arranged between the fixed template 5 and the movable template 6, and the concave mold 1 and the punch 2 are arranged between the fixed template 5 and the movable template 6. The mold 1 is fixed on the fixed template 5, the punch 2 is fixed on the movable template 6, the side of the punch 2 opposite to the die 1 is provided with a runner 7, and both ends of the runner 7 are provided with There is a gap 8, and the punch 2 is provided with a condensate hole 9 at the center of the runner 7, and several grooves 10 are arranged on the inner wall of the condensate hole 9, and the inner wall of the condensate hole 9 is used to open the mold. The groove 10 hooks the cold material inside and pulls out the condensed material. When demoulding, the condensed material is pushed out of the mold by the pulling rod 29 to realize automatic demoulding. Two gaps 8 feeding can reduce the generation of weld marks.

As shown in Figures 8 and 9, the pouring system includes a sprue bushing 11, the sprue bushing 11 passes through the fixed plate 5 and the die 1 in turn to communicate with the cavity 4, and the sprue bushing 11 is provided with a cone shaped sprue 12, the small end of the conical sprue 12 is located at the feed end of the sprue sleeve 11, and the width of the conical sprue 12 is gradually enlarged toward the direction of the runner 7, which can ensure that when the gate is broken, The tapered sprue 12 of the sprue bushing 11 is broken at the minimum width, and the sprue marks only need to be repaired less, which reduces the subsequent processing time.

As shown in Figure 3, the lateral core-pulling mechanism includes a cylindrical oblique guide column 13, the oblique guide column 13 is fixed on the fixed plate 5, and the side core slider 3 is provided with a A slanted hole 14 matching the guide post 13, the slanted guide post 13 is slidably connected with the slanted hole 14, a plane 15 is provided on the side of the slanted guide post 13, and the side core slider 3 is slidably installed on the On the movable template 6 , there is a gap between the plane 15 on the slanted guide post 13 and the slanted hole 14 to form a void, which is beneficial to the smooth guiding and sliding of the slanted guide post 13 in the slanted hole 14 .

As shown in Figures 1 and 5, the lateral parting mechanism includes a push rod fixing seat 16, a push plate 17, an inclined top 18 and a movable mold base 19, and the push rod fixing seat 16, the push rod fixing seat 16, and the push rod fixing seat 16 are successively installed under the movable template 6. Plate 17 and movable mold base 19, a number of springs 20 are installed between the movable template 6 and the push rod fixing seat 16, the punch 2 is provided with a through hole 21 matching the inclined top 18, An inclined roof hole 22 is arranged below the through hole 21 on the movable template 6, and the bottom end of the inclined roof 18 is slidingly connected with the push plate 17, and the top end of the inclined roof 18 passes through the inclined roof hole. 22 is located in the through hole 21, and there is a gap between the side wall of the inclined roof 18 and the inclined roof hole 22. Since the inclined roof 18 is inclined, if the inclined hole is to be processed on the movable template 6 to cooperate with it, The processing difficulty is relatively high. During processing, it can be processed into square and straight holes, and the size is larger than the diameter of the inclined top 18. It is enough to reserve the displacement space of the inclined top 18 during movement, which greatly simplifies the processing technology.

As shown in Figure 3, the side core slider 3 is provided with a T-shaped guide rail, and the movable template 6 is provided with a chute 23, and the movable template 6 is provided on both sides of the chute 23. There is a bead 24, and a T-shaped slot matching the T-shaped guide rail is formed between the bead 24 and the chute 23. The chute 23 is easy to process, while the traditional T-shaped slot needs to be replaced with a special T-shaped milling cutter during processing. Processing is time-consuming and laborious.

As shown in Figures 1, 5, 7, 12, 13 and 14, a protrusion 25 is provided on the top end surface 26 of the inclined top, and the protrusion 25 is in contact with the side and the top surface of the inner cavity of the plastic part. The lower end surface of the side is in contact with the top end surface 26 of the inclined roof, and the thickness L2 of the side of the plastic part in contact with the top end surface 26 of the inclined roof is smaller than the distance from the outermost point on the top end surface 26 of the inclined roof to the protrusion 25 L, on the one hand, prevent the inclined top 18 from damaging the edge of the plastic part during the ejection process, resulting in strain or deformation of the edge of the plastic part; 18 reset, it will first contact the die 1 to reset when the mold is closed, and there is no need to add a reset rod.

As shown in Figures 1 and 10, the cooling device includes multiple cooling channels, and each cooling channel passes through the movable template 6, punch 2, fixed template 5 and die 1 in turn, and the cooling channels The water inlet 27 is arranged on the movable formwork 6, and the water outlet 28 of the cooling channel is arranged on the fixed formwork 5, and the cooling water rises and discharges from the lower end layer by layer, so that there is no water accumulation problem and a better cooling effect is obtained.

As shown in FIG. 1 , the condensate pocket 9 is provided with a matching pulling rod 29 , and the pulling rod 29 is fixed on the push rod fixing seat 1 .

As shown in Figures 3 and 4, the bead 24 is provided with a positioning block 30, and the movable template 6 is provided with a positioning groove matching the positioning block 30, and the positioning block 30 snaps into the positioning groove Inside, because the positioning block 30 snaps into the positioning groove on the movable template 6, the bead 24 will not be offset on the movable template 6, which ensures the sliding of the side core slider 3 on the movable template 6.

working principle:

Through the groove 10 on the inner wall of the condensate cavity 9, the cold material inside is hooked and the condensate is pulled out to realize the automatic separation of the plastic part and the pouring system condensate from the mold during demoulding; Road 12, when the plastic part and the gate are broken, it is broken near the gate, and the gate marks only need to be repaired less or not; through the bead 24 and the chute 23, a T-shaped rail matching the T-shaped guide rail is formed. groove, so that the movable template 6 only needs to be milled with a milling cutter, which is convenient for mold repair and grinding, simplifies the processing technology, and ensures the reliability of the use of the bead 24; the plane 15 is set on the side of the inclined guide post 13, so that the inclined guide post 13 There is a gap between the plane 15 and the inclined hole 14, which is conducive to the stable and reliable sliding of the inclined guide post 13; by processing the inclined top hole 22 into a square straight hole, it is sufficient to reserve the displacement space of the inclined top 18 during movement, which greatly The mold structure is simplified to reduce processing difficulty; by setting the water inlet of the cooling water channel below the water outlet 28, water accumulation in the cooling water channel is avoided and a better cooling effect is obtained.

The above-mentioned ideal embodiment according to the utility model is an inspiration, and through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the utility model. The technical scope of this utility model is not limited to the content in the description, but must be determined according to the scope of the claims.

Claims (10)

1. an end covers plastic part mould, is characterized in that: comprise shaping mechanism, running gate system, cooling device, side core-drawing mechanism and undercut mechanism;

Described shaping mechanism comprises die (1), punch (2) and side core slide block (3), and described side core slide block (3), die (1) and punch (2) matched moulds form the die cavity (4) matched with plastic;

Described running gate system is communicated with described die cavity (4), and described cooling device and side core-drawing mechanism are all arranged on described shaping mechanism, and described undercut organization establishes is in the below of described shaping mechanism.

2. end covers plastic part mould according to claim 1, it is characterized in that: described shaping mechanism also comprises solid plate (5) and moving platen (6), described die (1) and punch (2) are arranged between described solid plate (5) and moving platen (6), described die (1) is fixed on solid plate (5), described punch (2) is fixed on moving platen (6), the one side that described punch (2) is relative with die (1) is provided with runner (7), the two ends of described runner (7) all offer breach (8), the centre described punch (2) being positioned at runner (7) is provided with solidifying material cave (9), the inwall of described solidifying material cave (9) is provided with some grooves (10).

3. end covers plastic part mould according to claim 2, it is characterized in that: described running gate system comprises sprue bush (11), described sprue bush (11) is communicated with die cavity (4) with die (1) through solid plate (5) successively, described sprue bush (11) is provided with taper sprue (12), the small end of described taper sprue (12) is positioned at the feed end of sprue bush (11).

4. end covers plastic part mould according to claim 3, it is characterized in that: described side core-drawing mechanism comprises columned Angle Pin (13), described Angle Pin (13) is fixed on solid plate (5), described side core slide block (3) is provided with the inclined hole (14) matched with described Angle Pin (13), described Angle Pin (13) and described inclined hole (14) are slidably connected, the side of described Angle Pin (13) offers plane (15), described side core slide block (3) is slidably mounted on described moving platen (6).

5. end covers plastic part mould according to claim 4, it is characterized in that: described undercut mechanism comprises push rod holder (16), push pedal (17), oblique top (18) and dynamic model base (19), push rod holder (16) is installed successively in described moving platen (6) below, push pedal (17) and dynamic model base (19), some springs (20) are installed between described moving platen (6) and described push rod holder (16), described punch (2) is provided with the through hole (21) matched with described oblique top (18), the below described moving platen (6) being positioned at through hole (21) is provided with inclined top hole (22), bottom and the described push pedal (17) of described oblique top (18) are slidably connected, the top of described oblique top (18) is positioned at through hole (21) through described inclined top hole (22), gap is left between the sidewall of described oblique top (18) and inclined top hole (22).

6. end covers plastic part mould according to claim 4, it is characterized in that: described side core slide block (3) is provided with T-shaped guide rail, described moving platen (6) offers chute (23), the both sides described moving platen (6) being positioned at described chute (23) are provided with press strip (24), form the T-slot that described T-shaped guide rail matches between described press strip (24) and chute (23).

7. end covers plastic part mould according to claim 5, it is characterized in that: the top end face (26) of described oblique top is provided with projection (25), side and the end face of described projection (25) and plastic inner chamber contact, plastic side lower surface contacts with the top end face (26) of described oblique top, and the thickness of the plastic side contacted with the top end face (26) of oblique top is less than the distance of point to protruding (25) of the upper outermost of top end face (26) of oblique top.

8. end covers plastic part mould according to claim 2, it is characterized in that: described cooling device comprises multichannel cooling water channel, cooling water channel described in every road is successively through described moving platen (6), punch (2), solid plate (5) and die (1), the water inlet (27) of described cooling water channel is arranged on moving platen (6), and the delivery port (28) of described cooling water channel is arranged on solid plate (5).

9. end covers plastic part mould according to claim 5, it is characterized in that: described solidifying material cave (9) is provided with the sprue puller (29) matched with it, and described sprue puller (29) is fixed on push rod holder (16).

10. end covers plastic part mould according to claim 6, it is characterized in that: described press strip (24) is provided with locating piece (30), described moving platen (6) is provided with the locating slot matched with described locating piece (30), described locating piece (30) snaps in described locating slot.