Plastic bag production injection mold

Abstract

The utility model provides a plastic bag production injection mold, and relates to the technical field of injection molds, the plastic bag production injection mold comprises a movable mold, a static mold is arranged on the back of the movable mold, an injection molding groove is formed in the front of the static mold, clamping grooves are symmetrically formed in the left side and the right side in the injection molding groove, and pattern modules are arranged in the clamping grooves; circular grooves penetrating through the clamping grooves are formed in the left side and the right side of the static mold, cylinders are arranged in the circular grooves, threaded rods are arranged in the cylinders, limiting blocks are arranged in the cylinders and located on the peripheries of the threaded rods, and inserting grooves are symmetrically formed in the bottoms, close to the top end, of the left side and the right side of the back face of the static mold; and through cooperative use of the clamping groove, the pattern module, the threaded rod, the threaded opening and the cylinder, the pattern module can be rapidly replaced, the whole mold does not need to be replaced, and the production cost of a manufacturer is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold for producing plastic bags. Background Art

[0002] Plastic bags are made of plastic and are used to package various items in daily life. They are widely used in daily life and industrial production. However, this temporary convenience brings long-term harm. Commonly used plastic packaging bags are mostly made of polyethylene film, which is non-toxic and can be used to hold food.

[0003] In order to meet market demand, the styles of plastic bags also need to be diverse. The most common style change is to adjust the style of decorative patterns. There are many plastic bags with the same size but different decorative patterns. The existing injection mold structure for plastic bag production is relatively simple, which makes it inconvenient to replace the decorative stripes inside. As a result, manufacturers need to design special molds for different styles, which is not practical and greatly increases production costs. Therefore, we propose an injection mold for plastic bag production. Utility Model Content

[0004] The purpose of the present invention is to solve the shortcomings of the prior art. In order to meet market demand, the styles of plastic bags also need to be diverse. The most common style change is to adjust the style of decorative patterns. There are many plastic bags with the same size but different decorative patterns. The existing injection mold structure for plastic bag production is relatively simple, which is not convenient for replacing the decorative stripes inside. As a result, manufacturers need to design special molds for different styles, which is not practical and greatly increases production costs.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A plastic bag production injection mold, comprising a movable mold, with a static mold provided on the back of the movable mold;

[0007] An injection groove is provided on the front of the static mold, and card slots are symmetrically provided on the left and right sides of the injection groove. A pattern module is provided inside the card slot. Circular grooves are provided on the left and right sides of the static mold through the card slot, and a cylinder is provided inside the circular groove. A threaded rod is provided inside the cylinder. A limiting block is provided inside the cylinder and on the periphery of the threaded rod. Slots are symmetrically provided on the left and right sides of the back of the static mold near the bottom of the top.

[0008] As a preferred solution of the present invention, an extrusion block is provided on the back of the movable mold, and an injection port is provided on the front of the movable mold through the extrusion block.

[0009] The technical effect of adopting the above further solution is: pushing the extrusion block into the injection groove, injecting the hot melt plastic into the injection groove through the injection port, and completing the molding of the plastic bag by utilizing the gap between the extrusion block and the injection groove.

[0010] As a preferred solution of the present invention, the back side of the static mold is arranged on the push plate, and the front side of the push plate is arranged on the insertion rod corresponding to the slot, and the insertion rod is slidably connected to the slot.

[0011] The technical effect of adopting the above further solution is: through the sliding connection between the insertion rod and the slot, after the hot melt plastic cools down, the insertion rod can be pushed into the injection groove by the push plate and ejected from the injection groove.

[0012] As a preferred solution of the present invention, the pattern module is adapted to the card slot, a threaded opening is provided on the back of the pattern module corresponding to the threaded rod, and the threaded rod is adapted to the threaded opening.

[0013] The technical effect of adopting the above further solution is: through the adaptation of the threaded rod and the threaded opening, the threaded rod can be rotated to enter the inside of the threaded opening, thereby completing the fixation of the pattern module.

[0014] As a preferred solution of the present invention, the cylinder is matched with the circular groove, and the threaded rod is matched with the cylinder.

[0015] The technical effect of adopting the above further solution is that the threaded rod can be rotated inside the cylinder by adapting the threaded rod to the cylinder, thereby fixing the pattern module.

[0016] As a preferred solution of the present invention, a limiting groove is provided inside the cylinder, the limiting block is fixedly connected to the threaded rod, and the limiting block is adapted to the limiting groove.

[0017] The technical effect of adopting the above further solution is: through the fixed connection between the limit block and the threaded rod, the threaded rod can be prevented from falling off due to excessive rotation, thereby improving the stability of use.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] In the utility model, through the design of the dynamic mold and the static mold, and through the coordinated use of the slot, pattern module, threaded rod, threaded mouth and cylinder, the pattern module can be quickly replaced without replacing the entire mold, thereby effectively reducing the manufacturer's production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of an injection mold for producing plastic bags provided by the utility model;

[0021] Figure 2A schematic diagram of the static mold structure of an injection mold for producing plastic bags provided by the utility model;

[0022] Figure 3 This is a front structural anatomical diagram of a static mold of a plastic bag production injection mold provided by the utility model;

[0023] Figure 4 This is an overall side structural anatomical diagram of a plastic bag production injection mold provided by the utility model.

[0024] Legend: 1. Moving mold; 101. Extrusion block; 102. Injection port; 2. Static mold; 201. Injection slot; 202. Clamping slot; 203. Pattern module; 2031. Threaded port; 204. Circular slot; 205. Cylinder; 2051. Limiting slot; 206. Threaded rod; 207. Limiting block; 208. Slot; 209. Push plate; 210. Insert rod. DETAILED DESCRIPTION

[0025] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to relevant references, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0029] Example 1

[0030] like Figure 1-4 As shown, the utility model provides a technical solution: a plastic bag production injection mold, including a movable mold 1, a static mold 2 is provided on the back of the movable mold 1, an injection groove 201 is opened on the front of the static mold 2, and a card slot 202 is symmetrically opened on the left and right sides of the injection groove 201, and a pattern module 203 is provided inside the card slot 202. Circular grooves 204 are opened on the left and right sides of the static mold 2 through the card slot 202, a cylinder 205 is provided inside the circular groove 204, a threaded rod 206 is provided inside the cylinder 205, and a limiting block 207 is provided inside the cylinder 205 and on the periphery of the threaded rod 206, and slots 208 are symmetrically opened on the left and right sides of the back of the static mold 2 near the top bottom.

[0031] Example 2

[0032] like Figure 1-4 As shown, an extrusion block 101 is provided on the back of the movable mold 1, and an injection port 102 is provided on the front of the movable mold 1 through the extrusion block 101, and the extrusion block 101 is pushed into the injection groove 201, and the hot melt plastic is injected into the injection groove 201 through the injection port 102, and the molding of the plastic bag is completed by utilizing the gap between the extrusion block 101 and the injection groove 201. The back of the static mold 2 is provided with a push plate 209, and the front of the push plate 209 corresponds to the slot 208 and is provided with an insert rod 210, and the insert rod 210 is slidably connected with the slot 208. Through the sliding connection between the insert rod 210 and the slot 208, after the hot melt plastic cools down, the insert rod 210 can be pushed into the injection groove 201 through the push plate 209 and ejected from the injection groove 201. The pattern module 203 is adapted to the card slot 202, and the back of the pattern module 203 corresponds to the threaded rod 206 and is provided with a threaded The threaded rod 206 is adapted to the threaded opening 2031. By adapting the threaded rod 206 to the threaded opening 2031, the threaded rod 206 can be rotated to enter the inside of the threaded opening 2031, thereby completing the fixing of the pattern module 203. The cylinder 205 is adapted to the circular groove 204, and the threaded rod 206 is adapted to the cylinder 205. By adapting the threaded rod 206 to the cylinder 205, the threaded rod 206 can be rotated inside the cylinder 205, thereby fixing the pattern module 203. A limiting groove 2051 is provided inside the cylinder 205, and the limiting block 207 is fixedly connected to the threaded rod 206. The limiting block 207 is adapted to the limiting groove 2051. The fixed connection between the limiting block 207 and the threaded rod 206 can prevent the threaded rod 206 from falling off due to excessive rotation, thereby improving the stability of use.

[0033] The working process of the present invention is as follows: when replacing a pattern module of an injection mold for producing a plastic bag, first rotate the threaded rod 206 to disengage its spiral from the threaded opening 2031, push the cylinder 205, and move it in the direction of the pattern module 203 inside the circular groove 204, so that the cylinder 205 pushes the pattern module 203 out from the inside of the card slot 202, completing the disassembly of the pattern module 203, reset the cylinder 205, push the replaced pattern module 203 from the inside of the injection groove 201 into the card slot 202, rotate the threaded rod 206 in the opposite direction to make it spiral into the inside of the threaded opening 2031, complete the fixation of the pattern module 203, and complete the entire replacement process without replacing the entire mold, effectively reducing the manufacturer's production cost.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic bag production injection mold, comprising a movable mold (1), characterized in that: A static mold (2) is provided on the back of the movable mold (1); The front of the static mold (2) is provided with an injection groove (201), and the inside of the injection groove (201) is symmetrically provided with a card slot (202), and the inside of the card slot (202) is provided with a pattern module (203). The left and right sides of the static mold (2) are provided with a circular groove (204) penetrating the card slot (202), and the inside of the circular groove (204) is provided with a cylinder (205), and the inside of the cylinder (205) is provided with a threaded rod (206). A limit block (207) is provided inside the cylinder (205) and on the periphery of the threaded rod (206). The back of the static mold (2) is symmetrically provided with a slot (208) at the bottom near the top on the left and right sides.

2. The injection mold for producing plastic bags according to claim 1, characterized in that: An extrusion block (101) is provided on the back of the movable mold (1), and an injection port (102) is provided on the front of the movable mold (1) through the extrusion block (101).

3. The injection mold for producing plastic bags according to claim 1, characterized in that: The back of the static mold (2) is arranged on a push plate (209), and the front of the push plate (209) is arranged on an insertion rod (210) corresponding to the slot (208), and the insertion rod (210) is slidably connected to the slot (208).

4. The injection mold for producing plastic bags according to claim 1, characterized in that: The pattern module (203) is adapted to the card slot (202); a threaded opening (2031) is provided on the back of the pattern module (203) corresponding to the threaded rod (206); and the threaded rod (206) is adapted to the threaded opening (2031).

5. The injection mold for producing plastic bags according to claim 1, characterized in that: The cylinder (205) is adapted to the circular groove (204), and the threaded rod (206) is adapted to the cylinder (205).

6. The injection mold for producing plastic bags according to claim 1, characterized in that: A limiting groove (2051) is provided inside the cylinder (205), the limiting block (207) is fixedly connected to the threaded rod (206), and the limiting block (207) is adapted to the limiting groove (2051).

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