An injection mold with variable injection cavity size for processing plastic products

Abstract

The utility model discloses an injection mold with a variable injection cavity size for processing plastic products, which relates to the field of injection molds, and aims to solve the problem that the size of the injection cavity of the conventional injection mold in the prior art is usually fixed after manufacturing, and cannot be adjusted according to the needs of different products. A driving cylinder is installed in the middle of the rear end of the lower mold, and the output shaft end of the driving cylinder is connected to an injection cavity size driving adjustment frame, and the injection cavity size driving adjustment frame includes a rear connecting plate, and the two sides of the front end of the rear connecting plate are integrally connected to a front connecting rod, and the inner side of the other end of the front connecting rod is integrally connected to an L-shaped inner block, and the inner side surface of the L-shaped inner block is a first inclined surface; injection cavity size adjustment components are arranged on both sides of the interior of the lower mold cavity, and the injection cavity size adjustment components include a first adjustment block and a second adjustment block, and the outer side surface of the second adjustment block is set as a second inclined surface.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to an injection mold with a variable injection cavity size for processing plastic products. Background Art

[0002] Injection mold is an important tool for producing plastic products. It plays a key role in the mass production of plastic products by giving them a complete structure and precise dimensions. Injection molding technology specifically refers to the process of injecting the heated and melted plastic into the mold cavity of the mold by an injection molding machine under high pressure, and obtaining a plastic product of the desired shape after cooling and solidification. Injection molds usually consist of two parts: a movable mold and a fixed mold. These two parts form a closed mold cavity when the molds are closed, into which the plastic melt is injected and solidified. Injection mold technology has been widely used in modern industrial production, especially in the fields of automobiles, home appliances, electronics, medical care, and daily necessities. With the continuous advancement of science and technology, injection mold technology has gone through the development stages from manual operation to semi-automatic operation, and then to fully automatic operation, and the precision, efficiency and degree of automation of the mold have been significantly improved.

[0003] In the processing of plastic products, the size of the injection cavity plays a decisive role in the shape and size of the final product. However, after the traditional injection mold is manufactured, the size of its injection cavity is usually fixed and cannot be adjusted according to the needs of different products. This limits the flexibility and application range of the injection mold, and increases production costs and production cycles. Utility Model Content

[0004] The purpose of the utility model is to provide an injection mold with a variable injection cavity size for processing plastic products, so as to solve the problem that the size of the injection cavity of the traditional injection mold proposed in the above background technology is usually fixed after manufacturing and cannot be adjusted according to the needs of different products.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an injection mold with a variable injection cavity size for processing plastic products, comprising a lower mold, a lower mold cavity is opened in the middle of the front end of the upper end face of the lower mold, a rear action cavity is opened inside the lower mold along the rear end of the lower mold cavity, a driving cylinder is installed in the middle of the rear end of the lower mold, an injection cavity size driving adjustment frame is connected to the output shaft end of the driving cylinder, the injection cavity size driving adjustment frame comprises a rear connecting plate, the rear connecting plate is located at the rear end of the rear action cavity, both sides of the front end of the rear connecting plate are integrally connected with a front connecting rod, the front end of the front connecting rod extends forward into the lower mold cavity, and the inner side of the other end of the front connecting rod is integrally connected with an L-shaped inner retracting block, the inner side surface of the L-shaped inner retracting block is a first inclined surface; injection cavity size adjustment components are arranged on both sides of the lower mold cavity, the injection cavity size adjustment component comprises a first adjustment block and a second adjustment block, the first adjustment block is integrally connected to the rear end of the second adjustment block, the outer side surface of the second adjustment block is set as a second inclined surface, and the first inclined surface is attached to the rear end position of the second inclined surface.

[0006] Preferably, the end surface of the front connecting rod is penetrated by a limit sliding groove on the left and right sides, and a limit sliding block is limit-sliding in the limit sliding groove, and the limit sliding block slides forward and backward along the limit sliding groove.

[0007] Preferably, a limiting sliding rod is fixed outside the first adjusting block, and the limiting sliding rod passes through the limiting sliding block and the lower mold and extends toward the outer side of the lower mold.

[0008] Preferably, a pressure spring is arranged between the first adjusting block and the limiting sliding block along the outside of the limiting sliding rod.

[0009] Preferably, an upper mold is provided at the upper end of the lower mold, an upper mold cavity is opened in the middle of the lower end surface of the upper mold, and the cross-sectional size of the upper mold cavity is the same as the cross-sectional size of the lower mold cavity.

[0010] Preferably, upper guide pillars are fixed at the four corners of the lower mold cavity at the upper end of the lower mold, and guide grooves are penetrated and opened on the upper mold at positions corresponding to the upper guide pillars, and the upper guide pillars slide relatively along the guide grooves.

[0011] Preferably, a lower supporting top mold unit is provided at the lower end of the lower mold, and the lower supporting top mold unit includes a top rod, and the upper end of the top rod extends to the lower mold cavity, and an injection tube is installed at the upper end of the upper mold.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) In the utility model, the output rod of the driving cylinder is extended to drive the rear connecting plate to move forward, and the front connecting rod and the L-shaped inward block are driven to move forward. Since the first inclined surface of the L-shaped inward block is in contact with the second inclined surface on the second adjustment block, the first adjustment block and the second adjustment block are pushed to move inward when the L-shaped inward block moves forward; the output rod of the driving cylinder is contracted, and the injection cavity size driving adjustment frame moves backward. The first adjustment block and the second adjustment block lose the force of the injection cavity size driving adjustment frame on them, and the pressure spring is reset to pull the first adjustment block and the second adjustment block to move outward. By moving the first adjustment block and the second adjustment block, the size of the injection cavity can be flexibly adjusted to meet the production needs of products of different sizes, greatly improving the versatility and production efficiency of the mold. It solves the problem that the size of the injection cavity of traditional injection molds is usually fixed after manufacturing and cannot be adjusted according to the needs of different products;

[0014] (2) In the utility model, a driving cylinder is used to drive the injection cavity size driving adjustment frame to move, and the limiting function of the limiting sliding groove and the limiting sliding block is coordinated to ensure the accuracy and stability of the injection cavity size adjustment, effectively avoiding product quality problems caused by size deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of an injection mold with a variable injection cavity size for processing plastic products according to the utility model from a main perspective;

[0016] Figure 2 It is a schematic diagram of the overall structure of an injection mold with a variable injection cavity size for processing plastic products according to the utility model from a bottom perspective;

[0017] Figure 3 This is a schematic structural diagram of an injection mold with a variable injection cavity size for processing plastic products according to the utility model after removing the upper mold;

[0018] Figure 4 This is a top view of an injection mold with a variable injection cavity size for processing plastic products according to the utility model after removing the upper mold;

[0019] Figure 5 This is a cross-sectional view at AA of an injection mold with a variable injection cavity size for processing plastic products according to the utility model;

[0020] Figure 6 It is a structural schematic diagram of an injection cavity size driving adjustment frame of an injection mold with a variable injection cavity size for processing plastic products according to the utility model;

[0021] Figure 7 The utility model is a structural schematic diagram of an injection cavity size adjustment component of an injection mold with a variable injection cavity size for processing plastic products.

[0022] In the figure: 1. lower supporting top mold unit; 2. lower mold; 3. lower mold cavity; 4. rear action cavity; 5. upper guide column; 6. ejector rod; 7. upper mold; 8. guide groove; 9. injection tube; 10. upper mold cavity; 11. driving cylinder; 12. injection cavity size driving adjustment frame; 13. rear connecting plate; 14. front connecting rod; 15. L-shaped inner block; 16. first inclined surface; 17. limit sliding groove; 18. injection cavity size adjustment component; 19. first adjustment block; 20. second adjustment block; 21. second inclined surface; 22. limit sliding rod; 23. limit sliding block; 24. pressure spring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] See also Figure 1-Figure 7 , an embodiment provided by the utility model:

[0025] (1) Injection mold main structure:

[0026] A lower mold cavity 3 is provided in the middle of the front end of the upper end face of the lower mold 2 for accommodating the injection molding material; an upper mold 7 is provided at the upper end of the lower mold 2, and an upper mold cavity 10 is provided in the middle of the lower end face of the upper mold 7, and the cross-sectional size of the upper mold cavity 10 is the same as that of the lower mold cavity 3. Upper guide pillars 5 are fixed at the upper end of the lower mold 2 along the four corners of the lower mold cavity 3, and guide grooves 8 are provided on the upper mold 7 at positions corresponding to the upper guide pillars 5, and the upper guide pillars 5 slide relatively along the guide grooves 8. This design ensures the precise alignment of the upper mold 7 and the lower mold 2 during the mold closing process, and improves the quality and precision of the injection molding product. At the same time, an injection molding tube 9 is installed at the upper end of the upper mold 7 for injecting the injection molding material into the injection molding cavity. A lower supporting top mold unit 1 is provided at the lower end of the lower mold 2, and the lower supporting top mold unit 1 includes a push rod 6, and the upper end of the push rod 6 extends to the lower mold cavity 3. After the injection molding is completed, the push rod 6 can eject the injection molding product, which is convenient for the removal of the product and the cleaning of the mold. Since there is no special design for the basic structure outside the injection mold and it does not affect the adjustment of the injection cavity size, its structure is not described in detail;

[0027] (2) Injection cavity size drive adjustment frame 12:

[0028] A rear action cavity 4 is provided inside the lower mold 2 along the rear end of the lower mold cavity 3, and the upper part of the structure of the injection cavity size driving adjustment frame 12 moves in the rear action cavity 4. The driving cylinder 11 is installed in the middle of the rear end of the lower mold 2, and its output shaft end is connected to the injection cavity size driving adjustment frame 12. The injection cavity size driving adjustment frame 12 includes a rear connecting plate 13, a front connecting rod 14 and an L-shaped inner retracting block 15. The rear connecting plate 13 is located at the rear end of the rear action cavity 4, and the front connecting rod 14 is integrally connected from both sides of the front end of the rear connecting plate 13 and extends forward into the lower mold cavity 3. The L-shaped inner retracting block 15 is integrally connected to the inner side of the other end of the front connecting rod 14, and the inner side surface of the L-shaped inner retracting block 15 is a first inclined surface 16. This design realizes the rapid adjustment of the injection cavity size and improves the production efficiency by driving the telescopic movement of the cylinder 11;

[0029] (3) Injection cavity size adjustment component 18:

[0030] An injection cavity size adjustment assembly 18 is arranged on both sides of the lower mold cavity 3, and the injection cavity size adjustment assembly 18 includes a first adjustment block 19 and a second adjustment block 20, and the first adjustment block 19 is integrally connected to the rear end of the second adjustment block 20. The outer side surface of the second adjustment block 20 is set to a second inclined surface 21, which fits with the first inclined surface 16 of the L-shaped inward block 15. When the L-shaped inward block 15 moves forward under the push of the driving cylinder 11, the first adjustment block 19 and the second adjustment block 20 are pushed inward by the interaction of the first inclined surface 16 and the second inclined surface 21, thereby achieving the reduction of the injection cavity size. Conversely, when the output rod of the driving cylinder 11 shrinks, the injection cavity size driving adjustment frame 12 moves backward, the first adjustment block 19 and the second adjustment block 20 lose their force, and move outward through the reset action of the pressure spring 24, thereby achieving the expansion of the injection cavity size.

[0031] The front connecting rod 14 has a limit sliding groove 17 extending through the left and right sides of the end surface. A limit sliding block 23 is limit-slidably disposed in the limit sliding groove 17 . The limit sliding block 23 slides forward and backward along the limit sliding groove 17 .

[0032] A limit sliding rod 22 is fixed to the outside of the first adjustment block 19, and the limit sliding rod 22 passes through the limit sliding block 23 and the lower mold 2 and extends to the outside of the lower mold 2. A pressure spring 24 is arranged between the first adjustment block 19 and the limit sliding block 23 along the outside of the limit sliding rod 22. When the injection cavity size needs to be expanded, the reset action of the pressure spring 24 can pull the first adjustment block 19 and the second adjustment block 20 to move outward. After the driving force of the injection cavity size driving adjustment frame 12 is lost, the pressure spring 24 retracts to drive the structure to reset, thereby realizing the rapid expansion of the injection cavity size.

[0033] Working principle: The position of the injection cavity size adjustment component 18 is adjusted according to the product size, so that the size between the two injection cavity size adjustment components 18 along the inner edges of the lower mold cavity 3 and the upper mold cavity 10 is the target size.

[0034] When reducing the injection molding size: the output rod of the driving cylinder 11 is extended to drive the rear connecting plate 13 to move forward, and the front connecting rod 14 and the L-shaped inward block 15 are driven to move forward. Since the first inclined surface 16 of the L-shaped inward block 15 is in contact with the second inclined surface 21 on the second adjustment block 20, when the L-shaped inward block 15 moves forward, it pushes the first adjustment block 19 and the second adjustment block 20 to move inward, the limit sliding block 23 slides relatively along the limit sliding groove 17, the limit sliding rod 22 slides inward along the limit sliding block 23, and the pressure spring 24 is stretched.

[0035] When the injection molding size has been reduced and needs to be expanded in subsequent use: the output rod of the driving cylinder 11 contracts, the injection cavity size driving adjustment frame 12 moves backward, the first adjustment block 19 and the second adjustment block 20 lose the force of the injection cavity size driving adjustment frame 12 on them, and the pressure spring 24 resets to pull the first adjustment block 19 and the second adjustment block 20 to move outward.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An injection mold with a variable injection cavity size for processing plastic products, comprising a lower mold (2), wherein a lower mold cavity (3) is provided in the middle of the front end of the upper end surface of the lower mold (2), and characterized in that: A rear action cavity (4) is provided inside the lower mold (2) along the rear end of the lower mold cavity (3); a driving cylinder (11) is installed in the middle of the rear end of the lower mold (2); an injection cavity size driving adjustment frame (12) is connected to the output shaft end of the driving cylinder (11); the injection cavity size driving adjustment frame (12) comprises a rear connecting plate (13); the rear connecting plate (13) is located at the rear end of the rear action cavity (4); front connecting rods (14) are integrally connected to both sides of the front end of the rear connecting plate (13); the front end of the front connecting rod (14) extends forward into the lower mold cavity (3); and the front connecting rod (14) is connected to the injection cavity size driving adjustment frame (12). 4) An L-shaped inward block (15) is integrally connected to the inner side of the other end, and the inner side surface of the L-shaped inward block (15) is a first inclined surface (16); injection cavity size adjustment components (18) are arranged on both sides of the interior of the lower mold cavity (3), and the injection cavity size adjustment component (18) includes a first adjustment block (19) and a second adjustment block (20), the first adjustment block (19) is integrally connected to the rear end of the second adjustment block (20), and the outer side surface of the second adjustment block (20) is arranged as a second inclined surface (21), and the first inclined surface (16) is in contact with the rear end position of the second inclined surface (21).

2. The injection mold with a variable injection cavity size for processing plastic products according to claim 1, characterized in that: The end surface of the front connecting rod (14) is provided with a limit sliding groove (17) extending therethrough on the left and right sides. A limit sliding block (23) is limit-slidably disposed in the limit sliding groove (17). The limit sliding block (23) slides forward and backward along the limit sliding groove (17).

3. The injection mold with a variable injection cavity size for processing plastic products according to claim 2, characterized in that: A limiting sliding rod (22) is fixed to the outside of the first adjustment block (19), and the limiting sliding rod (22) passes through the limiting sliding block (23) and the lower mold (2) to extend toward the outside of the lower mold (2).

4. The injection mold with a variable injection cavity size for processing plastic products according to claim 3, characterized in that: A pressure spring (24) is provided between the first adjustment block (19) and the limiting sliding block (23) along the outside of the limiting sliding rod (22).

5. The injection mold with a variable injection cavity size for processing plastic products according to claim 1, characterized in that: An upper mold (7) is arranged at the upper end of the lower mold (2), an upper mold cavity (10) is provided in the middle of the lower end surface of the upper mold (7), and the cross-sectional dimensions of the upper mold cavity (10) are the same as those of the lower mold cavity (3).

6. The injection mold with a variable injection cavity size for processing plastic products according to claim 5, characterized in that: Upper guide pillars (5) are fixed at the four corners of the lower mold cavity (3) along the upper end of the lower mold (2), and guide grooves (8) are formed through the upper mold (7) at positions corresponding to the upper guide pillars (5), and the upper guide pillars (5) slide relatively along the guide grooves (8).

7. The injection mold with a variable injection cavity size for processing plastic products according to claim 5, characterized in that: A lower supporting top mold unit (1) is provided at the lower end of the lower mold (2), and the lower supporting top mold unit (1) comprises a top rod (6), the upper end of the top rod (6) extends to the lower mold cavity (3), and an injection tube (9) is installed at the upper end of the upper mold (7).

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