CN207825387U - A kind of socket injection mold - Google Patents

Abstract

The utility model discloses a socket injection mold, which comprises a top plate, a bottom plate, a front formwork fixed on the bottom of the top plate, and a front mold core arranged inside the front formwork and fixed to the top plate; The sprue sleeve, the positioning ring set on the top plate for fixing the sprue sleeve, the support plate fixed above the bottom plate through the mold foot, the rear formwork fixed above the support plate, and the support plate fixed inside the rear formwork Rear mold core and ejector mechanism. The utility model optimizes the traditional socket production cycle, eliminates time waste and process waste in production, modularizes the mold design, simplifies the mold manufacturing process, saves production costs, and can produce sockets with relatively simple structures more efficiently and quickly , to maximize the benefits of mold manufacturing.

Description

A socket injection mold

technical field

The utility model belongs to the technical field of moulds, in particular to a socket injection mold.

Background technique

Plastic is a major invention of mankind in the 20th century. Its invention and widespread use have written a new chapter for human material civilization and greatly promoted the progress and prosperity of human society. China is a big manufacturing country, the product is the main body of the manufacturing industry, the mold is the soul of the manufacturing industry, and the development of the mold determines the development level of the manufacturing industry. With the continuous development of the modern industrial level and the improvement of industrial precision, the requirements for the mold industry are getting higher and higher, and higher requirements are put forward for the precision, speed and processing quality of mold manufacturing.

my country's plastic molds are developing rapidly. According to statistics, more than 200 interior trim molds are required to manufacture an ordinary car, while only about 50% of the large and medium-sized plastic molds required for manufacturing bumpers, instrument panels, fuel tanks, steering wheels, etc. can be satisfied. It has also become a trend for plastic building materials to replace traditional materials in large quantities. Plastic molds have formed a huge industrial chain; in recent years, my country's plastic molds have formed a huge industrial chain driven by high-tech drive and application needs of pillar industries, from the upstream raw and auxiliary materials industry and processing and testing equipment to the downstream In several major application industries such as machinery, automobiles, motorcycles, home appliances, electronic communications, and building materials, the development of plastic molds is full of vitality. At the same time, industries such as construction, appliances, and automobiles are all in high demand for plastics. It is estimated that the automobile and motorcycle industries alone need more than 10 billion yuan of molds every year; the color TV molds also have a market of about 2.8 billion yuan every year. With the rapid development of the pillar industries of the national economy such as building materials, this proportion will continue to increase.

For the cost budget of mold manufacturing, the price of molds is generally high, and the problem of mold cost needs to be solved, and the design of molds needs to simplify production and maintenance. Therefore, the starting point of this design is to simplify the mold manufacturing process, save production costs, and maximize the benefits of mold manufacturing.

Contents of the invention

The purpose of the utility model is to provide a socket injection mold which simplifies the mold manufacturing process and saves the production cost.

The technical solution to realize the purpose of this utility model is:

A socket injection mold, comprising a top plate, a bottom plate, a front formwork fixed at the bottom of the top plate, a front mold core fixed inside the front formwork and the top plate; The positioning ring set on the top plate for fixing the sprue sleeve, the supporting plate fixed above the bottom plate through the mold foot, the rear formwork fixed above the support plate, the rear mold core and the top plate fixed inside the back formwork and fixed to the support plate material organization.

Further, the ejector mechanism includes a ejector plate, a pull rod, an ejector, a spring and a guide column; the ejector plate is located between the supporting plate and the bottom plate, and the ejector plate is composed of an ejector panel and an ejector bottom plate , the pulling rod is fixed on the bottom plate of the ejector rod, one end of the ejector rod is fixed to the bottom plate of the ejector rod, and the other end passes through the supporting plate and the rear mold core in turn to contact with the product, and one end of the guide column is fixed on the ejector rod On the bottom plate, the other end passes through the supporting plate and the rear mold core, and the guide column is covered with a spring, and the two ends of the spring are respectively fixed on the rear mold plate and the ejector rod panel.

Further, the number of the springs is four, which are evenly distributed along the four sides of the push rod panel.

Further, a limit column is provided on the ejector rod panel.

Further, the sprue sleeve communicates with the cavity formed by the front mold core and the rear mold core through the sprue, the runner, and the gate.

Further, the cross-sectional area of the gate is 0.07-0.09 times the cross-sectional area of the runner, and the gate length is 0.5-1 mm.

Further, the mold is respectively provided with a cooling water channel that enters the front mold core along the front template and a cooling water channel that enters the rear mold core along the supporting plate.

Compared with the prior art, the utility model has the remarkable advantages of:

1. The utility model optimizes the production cycle of traditional sockets, eliminates time waste and process waste in production, modularizes the mold design, simplifies the mold manufacturing process, saves production costs, and can more efficiently and quickly convert sockets with relatively simple structures Produced to maximize the benefits of mold manufacturing.

2. The utility model optimizes the structure of the mold to improve production efficiency. Simultaneously, the simplification of the mold parts also facilitates the manufacture of the mold parts and reduces the phenomenon of waste caused by mistakes in the manufacturing process.

3. The mold structure of the utility model is simple, and the mold core is easy to manufacture. It is suitable for the production of plastic parts with simple structure and low surface quality requirements on non-use surfaces. The process can be improved according to customer requirements to meet the requirements of most plate products. Mass production, if there are other similar products to be produced, when the product size is suitable, the product mold core can be manufactured, and the mold core can be directly replaced to start production again, which saves the cost of the mold base and maximizes the practical value of the mold , Reduced mold maintenance costs and manufacturing costs.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a sectional view of the overall structure of the utility model.

Fig. 3 is a partial cross-sectional view of the flow channel in the utility model.

Fig. 4 is a schematic diagram of the structure of the main channel in the utility model.

Fig. 5 is a schematic diagram of the structure of the sub-runner and the runner gate of the utility model.

Fig. 6 is a partial cross-sectional view of the jacking structure in the utility model.

Fig. 7 is a partial cross-sectional view of the cooperation relationship among the boards of the present invention.

Fig. 8 is a schematic diagram of the mold temperature system in the utility model.

In the figure: 1 top plate; 2 front formwork; 3 nozzle; 4 front mold core; 5 rear mold core; 6 rear formwork; Screw; 13 long screw; 14 limit column; 15 pulling rod; 16, ring hole; 17, support column; 18, spring; ; 29 screws; 30 plugs; 31 cooling channels; 32 guide columns; 33 ejector rods.

Detailed ways

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

1-2, a socket injection mold, including a top plate 1, a bottom plate 9, a front template 2 fixed on the bottom of the top plate 1, a front mold core 4 arranged inside the front template 2 and fixed to the top plate 1; Top plate 1, front formwork 2, sprue sleeve 11 of front mold core 4; support plate 7 fixed above bottom plate 9 through die foot 8; rear formwork 6 fixed above support plate 7; set inside back formwork 6 and support The rear mold core 5 and the ejector mechanism that the plate 7 is fixed to each other; wherein, the front mold core 4 and the rear mold core 5 are closed to form a mold with two cavities, and the mold is provided with a ring hole 16 for installing a lifting ring. Since the mold uses a horizontal injection molding machine, the mold should be placed horizontally during production, and the mold should be installed by driving the crane to install the lifting ring.

Referring to Fig. 3, the sprue bushing 11 is used to connect the injection molding machine nozzle and the mold flow channel, and the sprue bushing 11 is connected to the front mold core 4 and the rear mold core 5 through the main channel 21, the runner 19, the gate 20 The formed cavities are connected, wherein the sprue 21 is used to guide the flowing plastic into the core cavity to form a plastic part, and the top plate 1 is provided with a positioning ring 10 for positioning the sprue sleeve 11 and the nozzle of the injection molding machine.

Furthermore, since the high-temperature melt is in direct contact with our sprue 21 during the injection molding process, the parts of the sprue 21 are easily damaged during processing, resulting in a relatively short service life of the sprue 21, so when using Parts should be replaced frequently in this embodiment. In this embodiment, we use a replaceable form. The specific form of the sprue bushing is shown in Figure 4.

The runner 19 is a part of the structure between the main runner 21 and the gate 20. For most of the multi-cavity structures of one mold, we need to use the runner 19 structure. The runner can transfer the molten plastic from the main runner 21 Evenly distributed to each cavity part, we need to consider the filling pressure for the design of the runner 19, to ensure that the product can meet the filling, and the compactness of the product can be ensured. Runners are generally used on plastic parts with multiple cavities in one mold and relatively large product sizes. In this embodiment, a semicircular runner structure is adopted, and it is distributed symmetrically, so a balanced runner is adopted, as shown in FIG. 5 .

Regarding the gate design of the product, it is generally necessary to consider the distribution of the cavity of the product and the quality requirements of the product on the surface, and analyze whether the surface of the product can allow the existence of casting marks. At present, the more gate forms used are mainly point gate, side gate and latent gate form. Among them, the side gate is for the structure with more cavities, the gate trace is on the side of the product, the point gate is for the mold with a single cavity, and the latent gate is at the bottom of the product, which is also used with multi-cavity In the form of injections. In this example, through the analysis of the product, the form of point gate is finally used. Generally speaking, the cross-sectional area of the gate is 0.07-0.09 times the cross-sectional area of the runner, and the length of the gate is generally about 0.5-1mm. , the actual size is finally determined by us through many tests.

For the design of the ejector structure of the mold, the ejector pin and the ejector plate are generally used. Which type to choose depends on the analysis of factors such as the size and wall thickness of the product. In this new model, our mold uses the form of a large nozzle. And because the product has a medium shape, we use a symmetrically arranged ejector pin to achieve the push out.

6, the ejector mechanism includes a ejector plate, a pull rod 15, an ejector 33, a spring 18 and a guide post 32; the ejector plate is located between the supporting plate 7 and the bottom plate 9, and the ejector plate The rod panel and the ejector pin bottom plate are composed; the pulling rod 15 is fixed on the ejector pin bottom plate, and is used to hold the plastic part when the injection molding is completed and the mold is opened to ensure that the plastic part is in the movable mold part, thereby ensuring the smooth completion of demoulding; The ejector pin 33 is used as the main push-out device, one end is fixed to the ejector pin bottom plate, and the other end passes through the supporting plate 7 and the rear mold core 5 in turn to contact the product. Since the mold is a mold with two cavities, in this embodiment, each The cavity is correspondingly equipped with six ejector pins, and two are arranged in the main flow channel 21 for ejecting waste materials in the flow channel.

The ejector pin panel is provided with a spring 18, and the other end of the spring 18 is fixed on the rear template 6. When the injection molding machine is connected and cancels the pushing force, the spring 18 pushes the ejector plate (the plate for fixing the ejector pin) backward. Power is used for resetting, and the number of springs 18 is four, which are evenly distributed around the push rod panel to ensure that the ejection force is even.

A guide column 32 is correspondingly provided in the spring 18, and the number of the guide column 32 can be two. One end of the guide column 32 is fixed on the bottom plate of the ejector pin, and the other end passes through the supporting plate 7 and the rear mold core 5, and the guide column is set. The main function of 32 is the clamping reset device. When the ejector plate moves up and down, the guide column 32 moves synchronously with the ejector plate. When moving upward, the guide column 32 extends into the part without material in the front mold core 4. The ejector plate is guided and positioned during the moving process. A limiting column 14 is also provided on the ejector plate to limit the displacement of the ejector plate.

The utility model adopts the ejector pin ejection method to eject materials, and analyzes the requirements of the plastic parts. The assembly requirement of the plastic parts is to cooperate with the outer frame. When the plastic parts are used, the requirements for the inner surface quality are not high, so the production can be saved. Cost and production cycle, using the direct ejection method to achieve rapid production.

Furthermore, specifically, the connection relationship between the boards of the present invention is as shown in Figure 7, the positioning ring 10 and the top plate 1 cooperate with the use of screws 27, the number is 4; the sprue sleeve 11 and the front template 2 cooperate with the use of screws 23, the quantity is 4; the top plate 1 and the front formwork 2 cooperate to form a screw 22, the quantity is 6; the front mold core 4 and the front formwork 2 use screw 12, the quantity is 6; the rear mold core 5 and the supporting plate 7 Connection, using screws 29, the number is 6; the limit post 14 on the ejector plate and the ejector panel are matched by screws 24, and two limit posts 14 are set during manufacture, so the number of screws corresponding to the two stop posts 14 is 2 Screws 25 are used for the cooperation of the ejector panel and the ejector base plate, and the quantity is 6; the cooperation between the base plate 9 and the mold feet 8 adopts screws 26, and the quantity is 4; the screws 13 are used to connect the base plate 9 to the rear formwork 6, and Play the role of extruding and fixing the die foot 8 and the supporting plate 7, so the screw 13 adopts a large screw. In actual use, the number of screws is not strictly in accordance with the above restrictions, and can be increased or decreased according to the needs.

In addition, temperature adjustment is also a key part of the mold. Only by adjusting the temperature of the mold well can we have a certain grasp of the quality of the product, because the product needs to be heated and processed again after filling. To carry out rapid cooling treatment, these times are relatively short, so the requirements for our temperature system are relatively high. It can be said that whether the temperature adjustment and control is reasonable directly affects the final product quality.

In conjunction with Fig. 2, the front template 2 and the supporting plate 7 are respectively provided with water nozzles 3 for feeding cooling water. Specifically, the shape and size of the square socket plastic parts in this embodiment are medium. When designing the cooling water channel The diameter at 31 o'clock is generally used If spot cooling is required, the diameter of the spot cooling water path is usually about 1.45 times the diameter of the straight-through water path connected to it. The distribution of the cooling water channels of the mold should be carried out according to the actual layout of the product, and the distribution of the cavity of the mold should also be considered. The cooling water channel 31 and the cooling water channel 31 entering the back mold core 5 along the supporting plate 7 .

The working process of the utility model:

The top plate 1 drives the front template 2 and the front mold core 4 to move down, and two socket cavities are formed between the front mold core 4 and the rear mold core 5, and the completed plastic parts are dissolved and injected into the main channel by the injection molding machine, and then pass through the runner and gate. Enter the cavity core, remove excess gas, and complete the injection molding within a certain pressure holding and temperature control time. After the injection molding is completed, inject cooling water into the nozzle to cool the liquid material, open the mold, and the top plate 1 drives The front template 2 and the front mold core 4 move upwards, the pulling rod 15 pulls out the condensed material in the main channel 21, the ejector plate moves, and the ejector 33 pushes out waste materials and products, completing a molding process.

Claims (6)

1. A socket injection mold is characterized in that: comprise top plate (1), bottom plate (9), The front formwork (2) that is fixed on top board (1) bottom, A front mold core (4) fixed to the top plate (1) inside the front template (2), Sprue bushing (11), The positioning ring (10) used to fix the sprue sleeve (11) is arranged on the top plate (1), The supporting plate (7) that is fixed on the top of the base plate (9) by the die foot (8), Be fixed on the back template (6) above supporting plate (7), The rear mold core (5) and the ejector mechanism fixed to the supporting plate (7) are arranged inside the rear template (6); Wherein the ejector mechanism includes a ejector plate and a material pulling rod (15), the ejector plate is located between the supporting plate (7) and the base plate (9), and the ejector plate is composed of an ejector panel and an ejector bottom plate, The pulling rod (15) is fixed on the bottom plate of the ejector pin, and the sprue sleeve (11) passes through the main channel (21), the runner (19), the gate (20) and the front mold core (4) and the rear The mold cavity formed by the mold core (5) is connected, and the pulling rod (15) is arranged corresponding to the main flow channel (21). 2. A socket injection mold according to claim 1, characterized in that: the ejector mechanism also includes a push rod (33), a spring (18) and a guide column (32); the push rod (33) One end is fixed to the bottom plate of the ejector pin, and the other end passes through the supporting plate (7) and the rear mold core (5) in order to contact the product. One end of the guide column (32) is fixed on the bottom plate of the ejector pin, and the other end passes through the supporting plate. Plate (7) and rear mold core (5), described guide post (32) outer jacket is provided with spring (18), and the two ends of spring (18) are respectively fixed on the rear formwork (6) and ejector bar panel. 3. A socket injection mold according to claim 2, characterized in that the number of said springs (18) is four, which are evenly distributed along the four sides of the ejector rod panel. 4. A socket injection mold according to claim 2, characterized in that: a limit column (14) is provided on the ejector rod panel. 5. The socket injection mold according to claim 1, characterized in that: the cross-sectional area of the gate (20) is 0.07-0.09 times the cross-sectional area of the runner, and the length of the gate is 0.5-1mm. 6. A socket injection mold according to claim 1, characterized in that: the mold is respectively provided with a cooling channel (31) that enters the front mold core (4) along the front template (2) and a cooling channel (31) along the supporting plate ( 7) Enter the cooling channel (31) of the rear mold core (5).