Molds that realize insert installation protection and precise positioning

Abstract

The invention discloses a mold for realizing installation protection and precise positioning of an insert, and belongs to the field of thermoplastic plastic molding molds. The mold realizes floating ejection of a fixed mold insert 12 and sequential ejection of a movable mold insert B17 and a movable mold insert C18 through the coordinated use of a spring 10, a ball head screw A21, a ball head screw B22, a push rod A25, and a push rod B26, thereby realizing pre-positioning and precise positioning of the insert 28 during installation, solving the positioning problem during installation of the insert, and saving mold costs, simplifying mold structure, and operating stably and reliably, realizing the protection of the insert 28 during installation and precise positioning in the mold, effectively utilizing mold space, and improving production efficiency.

Description

Technical Field

[0001] The present invention belongs to the field of thermoplastic plastic molding dies, and relates to a mold for realizing insert installation protection and precise positioning. The present invention is mainly used for insert installation and protection in injection mold production, and is particularly used in molding molds for plastic products provided with precision inserts. Background Art

[0002] The advantages of plastic products are mainly light weight, multiple practical application functions, good physical and chemical properties, good plasticity and sustainable utilization. In production and life, in order to enhance the functions of plastic products, metal inserts are often set on the structure of plastic products. Insert molding refers to the molding method of inserting pre-prepared inserts into the mold and then injecting resin. The molten material is combined with the insert and solidified to form an integrated product. For the installation of precision inserts, the traditional method of directly placing the inserts will cause damage to the inserts, increase the defective rate of plastic product production, and increase production costs. It is difficult to achieve installation protection of the inserts while ensuring the precise positioning of the inserts. Summary of the invention

[0003] The purpose of the present invention is to provide a mold that can achieve installation protection and precise positioning of the insert. Relying on the joint action of a spring, two ball head screws and a mold ejector rod, the fixed mold part and the movable mold part can be coordinated to ensure that the insert will not be damaged during installation. At the same time, the insert can be accurately positioned to ensure stable production of plastic products.

[0004] The technical problem to be solved by the present invention is to provide a mold that can achieve installation protection and precise positioning of inserts, thereby solving the problems in the molding of plastic products with inserts, especially the problems existing in the molding molds of plastic products that are provided with precision inserts and have multiple molds. The inserts can be accurately installed during the production process, and plastic products that meet the technical requirements and usage requirements can be produced.

[0005] The technical scheme of the present invention is: the structure of the mold for realizing the installation protection and precise positioning of the insert includes: a fixed mold bottom plate 1, a hot runner plate 2, a fixed mold plate 3, a movable mold plate 4, a square iron 5, a face needle plate 6, a bottom needle plate 7, a movable mold bottom plate 8, a backing plate A9, a spring 10, a push rod 11, a fixed mold insert 12, a fixed mold insert 13, an insert guide column 14, an insert guide sleeve 15, a movable mold insert A16, a movable mold insert B17, a movable mold insert C18, a movable mold insert D19, a pin 20, a ball head top screw A21, a ball head top screw B22, a movable mold insert 23, a backing plate B24, a push rod A25, a push rod B26, a limit column 27 and an insert 28, The connection relationship is as follows: the fixed mold bottom plate 1 is in surface contact with the hot runner plate 2 and is locked and fixed by bolts; the hot runner plate 2 is in surface contact with the fixed mold plate 3 and is locked and fixed by bolts; the fixed mold bottom plate 1, the hot runner plate 2 and the fixed mold plate 3 are connected by guide columns; the fixed mold plate 3 is provided with guide columns; the movable mold plate 4 is provided with guide sleeves; the fixed mold plate 3 is in surface contact with the movable mold plate 4 and is connected by guide columns and guide sleeves; the movable mold bottom plate 8 is in surface contact with the square iron 5 and is locked and fixed by bolts; the square iron 5 is in surface contact with the movable mold plate 4; the square iron 5, the movable mold plate 4 and the movable mold bottom plate 8 are locked and fixed by bolts; the surface needle plate 6 is in surface contact with the bottom needle plate 7 and is locked and fixed by bolts; the pad A9 is in surface contact with the hot runner plate 2 and is limited; the pad The plate A9 and the fixed mold plate 3 are clearance-matched and fixed by bolt locking, the upper and lower surfaces of the spring 10 are in surface contact with the pad A9 and the push rod 11 respectively, the spring 10 and the fixed mold plate 3 are clearance-matched, the push rod 11 and the fixed mold plate 3 are in surface contact and sliding cooperation, the fixed mold insert 12 and the fixed mold insert 13 are in surface contact and sliding cooperation, the bottom of the fixed mold insert 12 is in surface contact with the push rod 11 and the fixed mold plate 3, the fixed mold insert 13 is in surface contact and fixed by bolt locking, the insert guide column 14 and the fixed mold insert 13 are in surface contact and tightly matched and limited by the hanging table, the insert guide sleeve 15 and the movable mold insert 23 are in surface contact and tightly matched and limited by the hanging table, the insert guide column 14 and the insert guide sleeve 1 5. Surface contact and sliding fit. The movable mold insert A16 and the movable mold insert D19 are in surface contact and tight fit with the movable mold insert block 23 and are limited by the hanging table. The movable mold insert B17 is in surface contact and sliding fit with the movable mold insert block 23, the movable mold insert A16 and the movable mold insert D19. The movable mold insert C18 is in surface contact and sliding fit with the movable mold insert B17. The pin 20, the ball head screw A21 and the ball head screw B22 are in surface contact and tight fit with the movable mold insert C18. The pin 20 is in clearance fit with the movable mold insert A16. In the mold closing state, the ball head screw A21 is in surface contact and limited with the movable mold insert B17, and the ball head screw B22 is in surface contact and limited with the movable mold insert D19.The movable mold insert 23 is in surface contact with the movable mold plate 4 and is tightly matched and fixed by bolts. The movable mold insert A16, movable mold insert B17, movable mold insert C18, movable mold insert D19 and movable mold insert 23 are respectively in surface contact with the pad B24 and limited. The push rod A25 and push rod B26 are in clearance with the pad B24 and the movable mold plate 4. The push rod A25 and push rod B26 are in clearance with the face needle plate 6 and are limited by the hanging platform. The push rod A25 and push rod B26 are in surface contact with the bottom needle plate 7. The limiting column 27 is in surface contact with the face needle plate 6 and is fixed by bolts. There is a gap between the bottom of the hanging platform set on the push rod 11 and the bottom of the countersunk hole set on the fixed mold plate 3, and the gap is the floating distance A of the push rod 11 when the mold is opened. The hanging platform set on the fixed mold insert 12 and the fixed mold insert 1 There is a gap between the countersunk holes of the hanging platform 3, and the gap is the floating distance B of the fixed mold insert 12 when the mold is opened, and the floating distance A is equal to the floating distance B; the ejector pin A25 is arranged below the movable mold insert B17, and in the mold closing state, a gap is arranged between the ejector pin A25 and the movable mold insert B17, and the gap is the delayed ejection distance C when the mold is ejected; the ejector pin B26 is arranged below the movable mold insert C18, and in the mold closing state, a gap is arranged between the ejector pin B26 and the movable mold insert C18, and the gap is the delayed ejection distance D when the mold is ejected, and the delayed ejection distance C is less than the delayed ejection distance D; the movable mold insert A16 is provided with a groove, and the groove is perpendicular to the axis of the pin 20, and the upper hemispherical pit and The lower hemisphere pit, the movable mold insert B17 is provided with an upper through groove and a lower through groove. In the mold closing state, the pin 20 is in clearance with the movable mold insert A16, the ball head of the ball head top screw A21 contacts and limits the upper through groove surface of the movable mold insert B17, and the ball head of the ball head top screw B22 contacts and limits the lower hemisphere pit surface set on the movable mold insert D19. In the mold opening state, the face needle plate 6 pushes the push rod A25 and the push rod B26 to make a linear motion. The push rod A25 first contacts the movable mold insert B17 and applies a thrust to the movable mold insert B17. At the same time, the movable mold insert B17 overcomes the friction force of the ball head top screw A21 to make a linear motion. When the ball head top screw A21 contacts the lower through groove set on the movable mold insert B17, it is limited. At this time, the movable mold insert A16 and the movable mold insert B17 are relatively stationary. When the push rod B26 contacts the bottom of the movable mold insert C18, the push rods A25 and B26 push the movable mold inserts A16 and B17 to make linear motion. When the ball head screw B22 leaves the lower hemisphere pit set on the movable mold insert D19 and contacts the upper hemisphere pit set on the movable mold insert D19, the pin 20 contacts the top of the groove set on the movable mold insert A16. The ball head screw B22 and the pin 20 limit the movable mold insert B17 and C18. At this time, the top surface of the limiting column 27 contacts the bottom of the movable mold plate 4, and the surface needle plate 6 and the bottom needle plate 7 stop moving. In the mold opening state, the push rod 11 pushes the fixed mold insert 12 to make linear motion under the action of the spring 10 and is limited by the hanging table. The fixed mold insert 12 protrudes from the fixed mold insert 13.The movable mold insert B17 is provided with a through hole, and the head of the movable mold insert C18 is cylindrical. The head of the movable mold insert C18 is in surface contact and sliding cooperation with the movable mold insert B17; during the installation of the insert 28, the lower part of the insert 28 is firstly slidably cooperated with the through hole provided on the movable mold insert B17 and is limited by the top of the movable mold insert C18, and the head of the fixed mold insert 12 is provided with a blind hole. When the mold is closed, the upper part of the insert 28 is slidably cooperated with the blind hole of the head of the fixed mold insert 12 and limited, and the movable mold Insert C18 pushes insert 28 to overcome the elastic force of spring 10 to reset fixed mold insert 12. Fixed mold insert 12 stops moving when it contacts fixed mold plate 3. At the same time, fixed mold insert 12 pushes insert 28 to make movable mold insert C18 overcome the friction force of ball head screw A21 to reset. When ball head screw A21 contacts the lower through groove set on movable mold insert B17, movable mold insert B17 and movable mold insert C18 as a whole overcome the friction force of ball head screw B22 to reset.

[0006] The working principle of the mold for realizing installation protection and precise positioning of inserts is as follows: utilizing the elastic force of the spring 10 to realize the floating of the fixed mold insert 12, and realizing the pre-positioning of the insert 28 during the installation process through the floating of the fixed mold insert 12; utilizing the limiting function of the ball head top screw A21 and the ball head top screw B22 to realize the combined movement of the movable mold insert B17 and the movable mold insert C18; utilizing the delayed ejection of the ejector pin A25 and the ejector pin B26 to realize the sequential ejection of the movable mold insert B17 and the movable mold insert C18; utilizing the combined application of the pin 20 and the movable mold insert A16 to realize the final positioning of the combination of the movable mold insert B17 and the movable mold insert C18; utilizing the buffering effect of the spring 10 on the reset of the fixed mold insert 12 and the limiting effect of the ball head top screw A21 and the ball head top screw B22 on the movable mold insert B17 and the movable mold insert C18, thereby realizing the installation protection and precise positioning of the insert 28.

[0007] The beneficial effects of the present invention are as follows: the mold realizes the floating ejection of the fixed mold insert 12 and the sequential ejection of the movable mold insert B17 and the movable mold insert C18 through the coordinated use of the spring 10, the ball head screw A21, the ball head screw B22, the ejector rod A25 and the ejector rod B26, realizes the pre-positioning and precise positioning of the insert 28 during the installation process, solves the positioning problem during the installation process of the insert, especially for the problems existing in the molding mold of the plastic product which is provided with precision inserts and has multiple molds, saves the mold cost, simplifies the mold structure, works stably and reliably, realizes the protection of the insert 28 during the installation process and the precise positioning in the mold, effectively utilizes the mold space, and improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The following is a detailed description of the embodiments with reference to the accompanying drawings.

[0009] Figure 1 This is a schematic diagram of the mold assembly to achieve insert installation protection and precise positioning Figure 1 .

[0010] Figure 2 This is a schematic diagram of the mold assembly to achieve insert installation protection and precise positioning Figure 2 .

[0011] Figure 3 This is a schematic diagram of mold insert installation for mold opening to achieve insert installation protection and precise positioning. Figure 3 .

[0012] Figure 4 This is a schematic diagram of the internal components of the mold to achieve insert installation protection and precise positioning Figure 4 .

[0013] Figure 5 This is a schematic diagram of the internal components of the mold to achieve insert installation protection and precise positioning Figure 5 .

[0014] In the figure: 1 fixed mold base plate; 2 hot runner plate; 3 fixed mold plate; 4 movable mold plate; 5 square iron; 6 surface needle plate; 7 bottom needle plate; 8 movable mold base plate; 9 pad A; 10 spring; 11 push rod; 12 fixed mold insert; 13 fixed mold insert; 14 insert guide column; 15 insert guide sleeve; 16 movable mold insert A; 17 movable mold insert B; 18 movable mold insert C; 19 movable mold insert D; 20 pin; 21 ball head screw A; 22 ball head screw B; 23 movable mold insert; 24 pad B; 25 ejector pin A; 26 ejector pin B; 27 limit pin; 28 insert. DETAILED DESCRIPTION

[0015] The specific embodiments of the invention are described in detail below with reference to technical texts and drawings.

[0016] When assembling the mold, the fixed mold base plate 1 is in contact with the hot runner plate 2, and the bolts pass through the fixed mold base plate 1 to lock and fix it with the hot runner plate 2. The fixed mold insert 12 is installed in the cavity processed by the fixed mold insert 13, and the insert guide post 14 is installed in the guide post hole processed by the fixed mold insert 13. The fixed mold insert 12 and the fixed mold insert 13 are installed as a whole in the cavity processed by the fixed mold plate 3. The bolts pass through the fixed mold plate 3 to lock and fix the fixed mold insert 13. The push rod 11 is installed in the hole processed by the fixed mold plate 3. The spring 10 is installed in the countersunk hole processed by the fixed mold plate 3 and contacts with the push rod 11. The pad A9 is installed in the cavity processed by the fixed mold plate 3, and the bolts pass through the pad A9 to lock and fix it with the fixed mold plate 3. The bolts pass through the fixed mold plate 3 to lock and fix it with the hot runner plate 2 (see Figure 1 , 2); Pin 20 is fitted in the pin hole processed in the movable mold insert C18, ball head screw A21 and ball head screw B22 are fitted in the screw hole processed in the movable mold insert C18, movable mold insert C18, pin 20, ball head screw A21 and ball head screw B22 cooperate with movable mold insert A16 and movable mold insert D19 as a whole, movable mold insert C18, movable mold insert A16 and movable mold insert D19 are fitted together in the mold cavity processed by the movable mold insert 23, insert guide sleeve 15 is fitted in the guide sleeve hole processed in the movable mold insert 23, pad B24 is fitted in the mold cavity processed by the movable mold plate 4, screw The bolt passes through the backing plate B24 to lock and fix it on the movable template 4, the movable mold insert 23 is installed in the mold cavity processed by the movable template 4, the bolt passes through the movable template 4 to lock and fix the movable mold insert 23, the ejector rod A25 and the ejector rod B26 are installed in the ejector rod hole processed by the face needle plate 6, the bolt passes through the bottom needle plate 7 to lock and fix it with the face needle plate 6, the ejector rod A25 and the ejector rod B26 are installed in the through holes processed by the movable template 4 and the backing plate B24, the movable mold bottom plate 8 is in contact with the square iron 5, the bolt passes through the movable mold bottom plate 8 to lock and fix it with the square iron 5, the bolt passes through the movable mold bottom plate 8 and the square iron 5 to lock and fix the movable template 4 (see Figure 1 , 2 ).

[0017] The installation process of insert 28 is as follows: before the installation of insert 28, the fixed mold part is in the state that spring 10 is in the ejected state, the push rod 11 ejects the fixed mold insert 12, and the fixed mold insert 12 protrudes from the fixed mold insert block 13, and the movable mold part is in the state that ejector A25 and ejector B26 eject movable mold insert B17 and movable mold insert C18 at the same time (see Figure 3 ); The insert 28 is installed in the through hole set on the movable mold insert A16 in the mold opening state, and the depth is limited by the head of the movable mold insert C18. When the mold is closed, the blind hole set on the fixed mold insert 12 contacts the insert 28 surface to limit the insert 28. The movable mold insert C18 pushes the insert 28 to overcome the elastic force of the spring 10 and push the fixed mold insert 12 to reset. When the fixed mold insert 12 contacts the fixed mold plate 3, it stops moving. The fixed mold insert 12 pushes the insert 28 to apply thrust to the movable mold insert C18. The movable mold insert C18 overcomes the friction force of the ball head screw A21 to reset. When the ball head screw A21 contacts the lower through groove set on the movable mold insert B17, the movable mold insert B17 and the movable mold insert C18 as a whole overcome the friction force of the ball head screw B22 to reset (see Figure 4 , 5 ).

[0018] The above is a superior implementation mode of the present invention. It should be pointed out that for technicians in the technical field to which the present invention belongs, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A mold that realizes insert installation protection and precise positioning, characterized by The structure comprises: a fixed mold base plate (1), a hot runner plate (2), a fixed mold plate (3), a movable mold plate (4), a square iron (5), a face needle plate (6), a bottom needle plate (7), a movable mold base plate (8), a backing plate A (9), a spring (10), a push rod (11), a fixed mold insert (12), a fixed mold insert (13), an insert guide column (14), an insert guide sleeve (15), a movable mold insert A (16), a movable mold insert B (17), a movable mold insert C (18), a movable mold insert D (19), a pin (20), a ball head screw A (21), a ball head screw B (22), a movable mold insert (23), a backing plate B (24), a push rod A (25), a push rod B (26), a limit The connection relationship is as follows: the backing plate A (9) is in surface contact with the hot runner plate (2) and is limited; the backing plate A (9) is in clearance fit with the fixed mold plate (3) and is fixed by bolts; the spring (10) is in clearance fit with the fixed mold plate (3); the push rod (11) is in surface contact and sliding fit with the fixed mold plate (3); the fixed mold insert (12) is in surface contact and sliding fit with the fixed mold insert block (13); the bottom of the fixed mold insert (12) is in surface contact with the push rod (11) and the fixed mold plate (3); the movable mold insert A (16) and the movable mold insert D (19) are in surface contact and tight fit with the movable mold insert block (23) and are limited by the hanging table; the movable mold insert B (17) is in surface contact with the movable mold insert block (23) and the movable mold insert A (16) and the movable mold insert D (19) are in surface contact and sliding cooperation, the movable mold insert C (18) and the movable mold insert B (17) are in surface contact and sliding cooperation, the pin (20), the ball head top screw A (21) and the ball head top screw B (22) are in surface contact and tight cooperation with the movable mold insert C (18), in the mold closing state, the ball head top screw A (21) and the movable mold insert B (17) are in surface contact and limited, and the ball head top screw B (22) and the movable mold insert D (19) are in surface contact and limited; there is a gap between the bottom of the hanging platform provided on the push rod (11) and the bottom of the countersunk hole provided on the fixed mold plate (3), and the gap is the floating distance A of the push rod (11) when the mold is opened; the hanging platform provided on the fixed mold insert (12) There is a gap between the fixed mold insert (13) and the countersunk hole of the hanging platform, the gap is the floating distance B of the fixed mold insert (12) when the mold is opened, and the floating distance A is equal to the floating distance B; the ejector pin A (25) is arranged below the movable mold insert B (17), in the mold closing state, the ejector pin A (25) and the movable mold insert B (17) are provided with a gap, the gap is the delayed ejection distance C when the mold is ejected; the ejector pin B (26) is arranged below the movable mold insert C (18), in the mold closing state, the ejector pin B (26) and the movable mold insert C (18) are provided with a gap, the gap is the delayed ejection distance D when the mold is ejected, and the delayed ejection distance C is smaller than the delayed ejection distance D;The movable mold insert A (16) is provided with a groove, and the groove is perpendicular to the axis of the pin (20). The movable mold insert D (19) is provided with an upper hemispherical pit and a lower hemispherical pit. The movable mold insert B (17) is provided with an upper through groove and a lower through groove. In the mold closing state, the pin (20) and the movable mold insert A (16) are clearance-matched, the ball head of the ball head screw A (21) contacts and limits the surface of the through groove on the movable mold insert B (17), and the ball head of the ball head screw B (22) contacts and limits the surface of the lower hemispherical pit provided on the movable mold insert D (19). In the mold opening state, the ejector pin A (25) first contacts the movable mold insert B (17) to apply a thrust to the movable mold insert B (17), and at the same time, the movable mold insert B (17) overcomes the ball head. The friction force of the top screw A (21) makes linear motion. When the ball head top screw A (21) contacts the lower through groove provided on the movable mold insert B (17), the position is limited. At this time, the movable mold insert A (16) and the movable mold insert B (17) are relatively stationary. At the same time, the top rod B (26) contacts the bottom of the movable mold insert C (18). The top rod A (25) and the top rod B (26) push the movable mold insert A (16) and the movable mold insert B (17) to make linear motion. When the ball head top screw B (22) leaves the lower hemisphere pit provided on the movable mold insert D (19) and contacts the upper hemisphere pit provided on the movable mold insert D (19), the pin (20) contacts the top of the groove provided on the movable mold insert A (16). The ball head top screw B (22) and The pin (20) limits the movable mold insert B (17) and the movable mold insert C (18); in the mold opening state, the push rod (11) pushes the fixed mold insert (12) to make a linear motion under the action of the spring (10) and is limited by the hanging table, and the fixed mold insert (12) protrudes from the fixed mold insert block (13); a through hole is provided on the movable mold insert B (17), and the head of the movable mold insert C (18) is cylindrical, and the head of the movable mold insert C (18) is in surface contact and sliding cooperation with the movable mold insert B (17); during the installation of the insert (28), the lower part of the insert (28) first slides with the through hole provided on the movable mold insert B (17) and is limited by the top of the movable mold insert C (18), and the head of the fixed mold insert (12) is in contact with the movable mold insert B (17). A blind hole is provided at the top. When the mold is closed, the upper part of the insert (28) slides and fits with the blind hole at the head of the fixed mold insert (12) and is limited. The movable mold insert C (18) pushes the insert (28) to overcome the elastic force of the spring (10) to reset the fixed mold insert (12). When the fixed mold insert (12) contacts the fixed mold plate (3), it stops moving. At the same time, the fixed mold insert (12) pushes the insert (28) to cause the movable mold insert C (18) to overcome the friction force of the ball head screw A (21) to perform reset movement. When the ball head screw A (21) contacts the lower through groove provided on the movable mold insert B (17), the movable mold insert B (17) and the movable mold insert C (18) as a whole overcome the friction force of the ball head screw B (22) to perform reset movement.

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